OPINION
Jet, Inc. (“Jet”) appeals the magistrate judge’s entry of summary judgment for Sewage Aeration Systems (“SAS”) on Jet’s federal claims of trademark infringement and false designation of origin, and state claims of trademark infringement, unfair competition, and dilution. Jet also appeals the magistrate judge’s refusal to grant leave for Jet to amend its complaint to add claims for trademark dilution under federal law and for cancellation of SAS’s trademark. Because the parties’ marks are not sufficiently similar to warrant trial on Jet’s trademark claims, and because amendment of Jet’s complaint would have been futile, we affirm the grant of summary judgment to SAS.
I. BACKGROUND
Both Jet and SAS manufacture sewage and waste-water treatment devices for homes. Jet began doing business in the 1950s under the name Jet Aeration, and in 1969 it officially changed its name to Jet, Inc. It first registered the trademark JET in 1969. SAS’s product is sold under the trademark AEROB-A-JET, which SAS registered in 1992, although it has used the mark since 1971. According to Jet, SAS first went into competition with Jet when SAS began making an AEROB-A-JET device available for home use in 1991. Jet Br. at 4.
Each party makes a product that uses a spinning shaft to create vacuums in waste water, thereby drawing ambient air down into the water. The presence of oxygen encourages the proliferation of aerobic bacteria, which consume toxic materials. Jet’s product is available as part of a complete package, with a specially fitted septic tank. The cost to the homeowner varies widely but is approximately $2,600 or more for the entire package, including installation. SAS’s device is usually added to an existing septic tank, although it can also be installed as part of a new system. The homeowner’s cost is $800 to $900.
Jet brought this action against SAS in December 1994, claiming trademark infringement under 15 U.S.C. § 1114 (Count One), false designation of origin under 15 U.S.C. § 1125(a) (Count Two), common law trademark infringement and unfair competition (Count Three), and common law dilution of a trademark (Count Four). Joint Appendix at 294-96 (Sec.Am.Compl.U121-34). Counts Three and Four are governed by Ohio law. The parties consented to present their case to a magistrate judge and appeal directly to this court rather than to a district judge. See 28 U.S.C. § 636(c).
SAS challenged the district court’s personal jurisdiction and did not file its answer until October 1995. In June 1996, Jet sought to amend its complaint to make technical corrections; to add a count for cancellation of SAS’s trademark; and to add a count for trademark dilution under 15 U.S.C. § 1125(e), which went into effect in January 1996. While permitting one technical correction, the magistrate judge otherwise denied the motion to amend without explanation.
On SAS’s motion for summary judgment, the magistrate judge held that simultaneous use of the JET and AEROB-A-JET marks was unlikely to cause confusion in the marketplace, thereby disposing of Counts One, Two, and Three of Jet’s complaint.
See Daddy’s Junky Music Stores, Inc. v. Big Daddy’s Family Music Ctr.,
II. ANALYSIS
A. LIKELIHOOD OF CONFUSION
To determine whether simultaneous use of two trademarks is likely to cause confusion, we consider the following factors:
*422 1. strength of the plaintiffs mark,
2. relatedness of the goods or services,
3. similarity of the marks,
4. evidence of actual confusion,
5. marketing channels used,
6. likely degree of purchaser care,
7. the defendant’s intent in selecting its mark, and
8. likelihood of expansion of the product lines.
See Frisch’s Restaurants, Inc. v. Elby’s Big Boy of Steubenville, Inc.,
Likelihood of confusion is a mixed question of fact and law.
See Wynn Oil Co. v. Thomas,
The magistrate judge was clearly correct in his resolution of several of the
Frisch
factors. It was correct to classify the parties’ devices as “related” under the broad standard used to decide whether two trademarks are competing in the same market (factor two).
See, e.g., Wynn,
With respect to the first factor, Jet is entitled to a presumption that its mark is strong. Because Jet’s trademark was registered for five years without successful challenge, it has “incontestable” status.
See
15 U.S.C. § 1065. While courts normally evaluate the strength of a trademark in terms of where the mark fits along a spectrum ranging from “(1) generic ... and (2) merely descriptive to (3) suggestive and (4) arbitrary or fanciful,”
Induct-O-Matic Corp. v. Inductotherm Corp.,
The magistrate judge was also correct to find that purchasers of Jet and SAS’s products are likely to exercise a great deal of care (factor six).
Generally, in assessing the likelihood of confusion to the public, the standard used by the courts is the typical buyer exercising ordinary, caution. However, when a buyer has expertise or is otherwise more sophisticated with respect to the purchase of the services at issue, a higher standard is proper. Similarly, when services are expensive or unusual, the buyer can be expected to exercise greater care in her purchases. When services are sold to such *423 buyers, other things being equal, there is less likelihood of confusion.
Homeowners Group, Inc. v. Home Mktg. Specialists, Inc.,
We agree with Jet that the magistrate judge erred in concluding that the potential for expanded competition between the parties (factor eight) was irrelevant. We have held that this factor is relevant even when the parties are already in competition, since increased overlap in product lines or geographic territory could increase the likelihood of confusion.
See Champions,
In determining the degree of similarity, we examine “the pronunciation, appearance and verbal translation of conflicting marks.”
Wynn,
'We have previously considered several cases involving a defendant whose mark contains all or a significant part of the plaintiffs mark. Jet relies primarily on Daddy’s Junky Music and Induct-O-Matic. Daddy’s Junky Music held that the defendant’s mark, BIG DADDY’S FAMILY MUSIC CENTER, was not sufficiently distinct from the plaintiffs DADDY’S to justify summary judgment, especially in light of the defendant’s use of abbreviations ’ such as BIG DADDY’S. The two marks in this case, however, are more distinct than DADDY’S and BIG DADDY’S. The most prominent part of AEROB-A-JET is not the shared term JET but the initial syllables AEROB-A, and there is no indication in the record that SAS or anyone else commonly abbreviates AEROB-A-JET as merely JET. In Induct-O-Matic, this court affirmed the district court’s finding, after trial, that IN-DUCTO and INDUCT-O-MATIC were confusingly similar. Again, the marks in this case are more distinctive. The addition of the suffix MATIC adds little meaning to the mark, and MATIC is not so prominent in the pronunciation of INDUCT-O-MATIC that it would readily distinguish the parties’ products in the marketplace.
Jet argues that the term AEROB-A is merely descriptive and therefore not eligible for trademark protection. Jet claims that we are therefore obliged, under Induct-O-Matic, to- delete that portion of the mark when assessing similarity. The comparison would then be between JET and JET. However, while AEROB-A refers to the relationship of SAS’s product to aerobic bacteria, it does not merely describe the product; it suggests the idea of bubbling air. AEROB-A in SAS’s mark is a distinctive term which is not merely descriptive. It is not appropriate to delete this distinctive portion of SAS’s mark when assessing similarity.
JET and AEROB-A-JET are visually and verbally distinct. AEROB-A-JET has four *424 syllables to JET’s one, and the first syllables of AEROB-A-JET are more prominent when the mark is pronounced. Both AE-ROB and JET are somewhat descriptive of how the parties’ devices operate, but neither is generic or merely descriptive of the process. Considering the impression made by the marks as a whole, JET and AEROB-A-JET are not confusingly similar.
In sum, the undisputed facts of this case establish that Jet and SAS are in direct competition, selling related goods through the same marketing channels. However, a reasonable jury could not conclude that the marks JET and AEROB-A-JET are confusingly similar, and the very high degree of care that purchasers in this market — both contractors with the skills and responsibility for installing home sewage treatment systems and homeowners spending hundreds or thousands of dollars to buy or repair such systems — can be expected to exercise eliminates virtually any possibility that SAS’s use of AEROB-A-JET will cause confusion.
B. DILUTION OF JET’S MARK
Anti-dilution laws protect a senior user’s mark even if the junior user is not a competitor and there is no likelihood of confusion between the two products. To prevail on a dilution claim, the senior user must demonstrate that it has a famous mark and that the junior user’s conduct damages the senior’s interest in the mark “by blurring its product identification or by damaging positive associations that have attached to it.”
Ameritech, Inc. v. American Info. Technologies Corp.,
The Federal Trademark Dilution Act of 1995, which went into effect in January 1996, provides that possession of a valid federal trademark registration is a complete bar to a dilution claim “under the common law or a statute of a State.” 15 U.S.C. § 1125(c)(3). Although SAS possesses a federal trademark registration for AEROB-A-JET, Jet argues that the federal law does not apply retroactively, and that SAS is therefore liable under Ohio law for violations prior to January 1996. We note that the traditional remedy for dilution is an injunction, not damages,
see
3 J. Thomas McCarthy, McCarthy on Trademarks and Unfair Competition § 24:73 (4th ed.1997), and that there is no Ohio authority suggesting a contrary rule. In addition, the Eighth Circuit has held that § 1125(c)(3) applies even when the request for an injunction is based on the defendant’s conduct before January 1996.
See Viacom Inc. v. Ingram Enters. Inc.,
Assuming Ohio courts would allow this cause of action between competitors, we conclude that Jet and SAS’s marks are not sufficiently similar to support a finding of dilution. Jet argues that the magistrate judge wrongly used “the same or very similar” as the degree of similarity required for a dilution claim. It points to several Ohio cases enjoining the use of marks referred to as merely “similar.” These cases, however, focus on the likelihood of consumer confusion rather than on dilution, and the marks at issue there are arguably “very similar.”
See Guild & Landis, Inc. v. Liles & Landis Liquidators, Inc.,
C. JET’S MOTION TO AMEND ITS COMPLAINT
Rule 15(a) of the Federal Rules of Civil Procedure states that leave to amend “shall be freely given when justice so requires.” Although the decision to permit amendment to a complaint after an answer has been filed is committed to the discretion of the trial court,
see General Elec. Co. v. Sargent & Lundy,
The claims Jet sought to add were so similar to the counts already in its complaint — which we have determined to lack merit — that the proposed amendment would have been futile. Jet sought cancellation of SAS’s trademark, which is necessary to overcome SAS’s affirmative defense to Jet’s dilution claim, and to make its dilution claim under federal as well as state law. Jet argues that allowing it to amend its complaint would not have prejudiced SAS because the factual basis for the new claims is the same as the basis for its infringement claim. However, on the facts Jet has alleged, the only possible ground for canceling SAS’s mark is the claimed likelihood of confusion between JET and AEROB-A-JET. See 3 MCCARTHY §§ 20:53, 20:54 (outlining grounds for cancellation). Our holding on Jet’s trademark infringement claim, that there is not a likelihood of confusion, necessarily precludes cancellation of SAS’s mark. Similarly, the federal dilution claim would fail because the marks are not sufficiently similar. Although some aspects of this claim would be different under the federal statute than under Ohio common law, we would sull require a greater degree of similarity than is needed under the likelihood of confusion test.
The futility of amending Jet’s complaint would have been appropriate grounds on which to deny the motion to amend.
See Marx v. Centran Corp.,
III. CONCLUSION
Because there is not a likelihood that the parties’ trademarks will be confused in the marketplace, and because Jet has not alleged facts sufficient to support a claim for trademark dilution, we AFFIRM the magistrate judge’s entry of summary judgment for SAS on all counts of Jet’s second amended complaint. We also AFFIRM the magistrate judge’s denial of leave to amend the complaint for the reasons stated in Part II.C.
