Individual holder
DUNCAN ERNEST R
4 granted patents·41 citations·filing 1974–1976
Individually held — no corporate assignee on record.
Technology mixG09B4
Top patents by PatentIndex Score
4 records- 0172US3974575ATeaching machineDUNCAN ERNEST R·Filed 1974·Granted Aug 17, 1976·21 cites·31 claims
- 0250US4051608ATeaching machineDUNCAN ERNEST R·Filed 1976·Granted Oct 4, 1977·10 cites·9 claims
- 0334US4085523ATeaching machineDUNCAN ERNEST R·Filed 1976·Granted Apr 25, 1978·5 cites·5 claims
- 0434US3977092ATeaching machine cardDUNCAN ERNEST R·Filed 1975·Granted Aug 31, 1976·5 cites·3 claims
Join the waitlist — get patent alerts
Get an alert when DUNCAN ERNEST R 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 →