Inventor · disambiguated record
William R. Heffernan
Also filed as: GINGRAS JOEL A SR · HEFFERNAN WILLIAM R
4 granted patents·91 citations·filing 1977–1979
78Inventor score
Files withAMERICAN CYANAMID CO4
Top patents by PatentIndex Score
4 records- 0176US4193109APersonnel marker deviceAMERICAN CYANAMID CO·Filed 1978·Granted Mar 11, 1980·30 cites·3 claims
- 0275US4186426AEmergency lighting deviceAMERICAN CYANAMID CO·Filed 1977·Granted Jan 29, 1980·32 cites·7 claims
- 0372US4184193AMulti-purpose lanternAMERICAN CYANAMID CO·Filed 1978·Granted Jan 15, 1980·25 cites·4 claims
- 0433US4299185ADevice for warning of impending roof-fall in underground excavationsAMERICAN CYANAMID CO·Filed 1979·Granted Nov 10, 1981·4 cites·6 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →