Schwartz v. Honeywell Int'l, Inc., 102 N.E.3d 477

Decedent Kathleen Schwartz died of mesothelioma; plaintiffs alleged exposure to asbestos from her father's work as an electrician and from Bendix-brand brake replacements done at home.
Husband Mark Schwartz sued Honeywell (successor to Bendix) claiming Kathleen’s exposure to Bendix brakes was a substantial factor in causing her disease under R.C. 2307.96.
Trial evidence: family testimony about occasional brake changes (5–10 times over 18 years), the father bringing asbestos dust home from work, and that Kathleen sometimes handled family laundry; expert Dr. Bedrossian testified there is no known exposure threshold and that all nonminimal exposures contributed to a cumulative dose that caused the mesothelioma.
Jury found Honeywell 5% liable and awarded over $1 million; Honeywell appealed arguing insufficient evidence of substantial causation tied to its products.
The Ohio Supreme Court accepted review to decide whether a cumulative-exposure theory — treating any nonminimal contribution to total asbestos dose as a substantial factor — satisfies R.C. 2307.96.

Issue	Plaintiff's Argument	Defendant's Argument	Held
Whether a cumulative-exposure theory (any nonminimal exposure contributing to total dose) satisfies R.C. 2307.96 substantial-factor requirement	Bedrossian: no known threshold; each nonminimal exposure contributes to cumulative dose, so Bendix exposures were causative	Cumulative theory is inconsistent with statute; must show for each particular defendant that manner, proximity, frequency, length of exposure make its conduct a substantial factor	Cumulative-exposure theory alone is insufficient under R.C. 2307.96; statute requires an individualized substantial-factor showing based on manner, proximity, frequency, length of exposure
Whether evidence about Bendix brake exposures met R.C. 2307.96 factors to survive directed verdict	Family testimony and expert cumulative-opinion suffice for jury to find Bendix a contributing substantial factor	Evidence of Bendix exposure was limited (occasional brake jobs, no specific instances of exposure) and paled compared to frequent occupational exposures from other manufacturers	Evidence was insufficient; directed verdict for Honeywell should have been granted

Horton v. Harwick Chem. Corp., 73 Ohio St.3d 679 (1995) (prior Ohio standard requiring each defendant's exposure to be a substantial factor)
Lohrmann v. Pittsburgh Corning Corp., 782 F.2d 1156 (4th Cir.) (manner-frequency-proximity test for asbestos exposure)
Lindstrom v. A-C Prod. Liab. Trust, 424 F.3d 488 (6th Cir.) (criticizing cumulative-exposure theory)
Martin v. Cincinnati Gas & Elec. Co., 561 F.3d 439 (6th Cir.) (rejected cumulative-exposure theory as rendering substantial-factor test meaningless)
McIndoe v. Huntington Ingalls, Inc., 817 F.3d 1170 (9th Cir.) (expressed concern about unbounded liability under cumulative theory)
Bostic v. Georgia-Pacific Corp., 439 S.W.3d 332 (Tex.) (discussing role of individual exposures within total cumulative dose)