RULING ON PENDING MOTION
In this suit for infringement of United States patent # 2,945,665 relating to the manufacture of ball valves, the defendant, Litton Industrial Products, Inc.,-Contromatics Division (“Contromatics”), has moved to dismiss on the grounds of laches and estoppel. Because both parties have presented for the court’s consideration affidavits and other matters outside the pleadings, the motion shall be treated as one for summary judgment in accordance with Rule 12(b), Fed.R.Civ.P.
The disputed Jamesbury patent was issued July 19, 1960. Beginning in 1963, and continuing to the present, Jamesbury has engaged in a series of litigations in the United States district courts designed to enforce this patent and protect it from infringement. First, Jamesbury brought suit against the United States in the Court of Claims. In May 1965, Jamesbury started actions against Worcester Valve in the District Court for Massachusetts and against the Lunkenheimer Company in the Southern District of Ohio. On July 18, 1966, E. W. Bliss Company intervened in the Worcester Valve litigation claiming it was in fact the owner of the Jamesbury patent. All three suits for infringement were stayed pending a decision as to the rightful owner of the patent. In addition in October 1970, Jamesbury commenced an action for infringement against Kitamura Valve Manufacturing Company in the Southern District of Texas.
The United States Court of Appeals for the First Circuit held in May 1971 that Jamesbury, not E. W. Bliss Company, was the owner of patent # 2,945,665.
Jamesbury Corp. v. Worcester Valve Co.,
Jamesbury had first contacted UTD Corporation, a predecessor of Litton Industries, on October 12, 1967, alleging an infringement by the Contromatics Division of the ball valve patent and offering to negotiate *758 a licensing agreement. 2 In a later letter dated November 17, 1967, Howard Freeman, President of Jamesbury, informed Contromatics that Jamesbury was then suing the United States in the Court of Claims to establish the validity and infringement of its patent. ■ Contromatics was at that time a supplier of ball valves to the federal government. The parties met on December 14, 1967, but came to no agreement. On January 5, 1968, Freeman wrote back to Contromatics saying, “We have reported your position to our attorneys and the subject is under careful consideration.” 3 It is undisputed that Contromatics received no further correspondence from Jamesbury until the filing of the instant law suit in February 1976. Contromatics argues that relying upon Jamesbury’s eight years of inaction, it expanded its production of ball valves, increased capital expenditures, purchased new manufacturing facilities, and transferred ownership of the division. Based on such delay and prejudice, Contromatics contends that this action should be dismissed for laches and estoppel.
I.
The law is clear that in a suit brought for infringement of a patent, “laches requires that there be, in the light of all the existing circumstances, an unreasonable delay resulting in prejudice to the other party.”
American Home Products Corp. v. Lockwood Mfg. Co.,
“While a patentee is getting his patent sustained he is not bound to assert his claims to their fullest scope by suing every conceivable infringer. . . . [I]f a manufacturer fears that he will be charged to infringe, he can always inquire of the patentee, and if the answer is unsatisfactory, he can bring an action for declaratory judgment.”
Cf. Langdon v. Saltser & Weinsier, Inc.,
The effect of other prior pending litigation as a defense to a claim of laches in a patent suit has recently caused controversy both among and within the Circuits.
Compare: American Home Products Corp. v. Lockwood Mfg. Co.,
Jamesbury informed Contromatics that the defendant’s valves infringed the patent in 1967. In addition, plaintiff notified the defendant of the pendency of the action against the United States in the Court of Claims. Contromatics was a supplier of ball valves to the United States. At oral argument, Jamesbury contended that Contromatics was aware that its own valves were involved in the Court of Claims suit. 4 These facts together with the letter of January 5,1968, in which Freeman told Contromatics that he was referring the matter to Jamesbury’s attorneys should have put the defendant on notice that plaintiff, did not intend to sleep on its rights, but rather was pursuing a suit for infringement in which valves manufactured by Contromatics might be implicated.
Relying on the Second Circuit’s unpublished affirmance in
Jones v. Ceramco, Inc.,
II.
The analysis is similar regarding the defense of estoppel. Like laches, estoppel requires an unexcused delay prejudicial to the defendant. Estoppel, however, incorporates an additional element of reliance on the plaintiff’s inaction. Moreover, where laches would only forbid the plaintiff from recovering any damages for infringement arising prior to the filing of the law suit, estoppel would act as a total bar to enforcement of the validity of the patent.
Cf. Continental Coatings Corporation v. Metco. Inc.,
I note therefore that plaintiff has raised a second issue of fact concerning Contromatics’ reliance in expanding production and facilities. Jamesbury, citing
Armstrong v. Motorola, supra,
and
Duval Sulphur & Potash Co. v. Potash Co. of America,
Because I find that there are triable issues of fact going to the defenses of laches and estoppel, summary judgment in favor of either party is precluded. Defendant’s motion is denied.
SO ORDERED.
Notes
. The Lunkenheimer and Kitamura litigations are still pending.
. There is no claim by defendant that plaintiff knew or should have known prior to 1967 of any possible infringement by Contromatics.
. Exhibit E to Defendant’s Memorandum in Opposition to Plaintiffs Motion under Rule 56(f), Fed.R.Civ.P.
. This is not unlikely given the meeting that took place between both firms in December 1967. Defendant has offered no affidavit or documentary evidence to show what occurred at this meeting.
. There is authority that suggests that once the plaintiff has delayed more than six years in suing for infringement, the burden shifts to it to demonstrate the delay was excused and did not prejudice the defendant.
Continental Coatings Corp. v. Metco. Inc., supra; Baker Manufacturing Co. v. Whitewater Manufacturing Co.,
