Assignee
MARSHALL JOHN M
US·4 granted patents·209 citations·filing 1985–1991
Top patents by PatentIndex Score
4 records- 0174US5211628ASyringe with automatic retracting needleMARSHALL JOHN M·Filed 1991·Granted May 18, 1993·181 cites·3 claims
- 0256US4848138AWindow gas monitorMARSHALL JOHN M·Filed 1988·Granted Jul 18, 1989·18 cites·9 claims
- 0330US4633233AWindow security deviceMARSHALL JOHN M·Filed 1985·Granted Dec 30, 1986·4 cites·2 claims
- 0429US4755800AWindow security deviceMARSHALL JOHN M·Filed 1987·Granted Jul 5, 1988·6 cites·4 claims
Join the waitlist — get patent alerts
Get an alert when MARSHALL JOHN M 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 →