Assignee
DARM WILLIAM J
3 granted patents·35 citations·filing 1974–1975
Top patents by PatentIndex Score
3 records- 0157US4140175AVertical counterflow heat exchanger apparatusDARM WILLIAM J·Filed 1975·Granted Feb 20, 1979·17 cites·14 claims
- 0245US3995688AAir-to-air heat exchangerDARM WILLIAM J·Filed 1975·Granted Dec 7, 1976·9 cites·6 claims
- 0345US3982588AGrease-collecting heat exchanger installationDARM WILLIAM J·Filed 1974·Granted Sep 28, 1976·9 cites·11 claims
Join the waitlist — get patent alerts
Get an alert when DARM WILLIAM J files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →