Individual holder
HSU CHARLES J
US·5 granted patents·79 citations·filing 1977–1990
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
5 records- 0179US4419236AWater detecting or absorbing device for use in and removal from a tank with a limited openingHSU CHARLES J·Filed 1982·Granted Dec 6, 1983·42 cites·16 claims
- 0247US4890485AMechanism which reacts to the presence of oil and/or waterHSU CHARLES J·Filed 1988·Granted Jan 2, 1990·12 cites·11 claims
- 0343US5146778AOil and/or water detection apparatusHSU CHARLES J·Filed 1990·Granted Sep 15, 1992·12 cites·14 claims
- 0441US4160465AEmergency water leak plugHSU CHARLES J·Filed 1977·Granted Jul 10, 1979·7 cites·1 claims
- 0537US4448027ACartridge containing water expandable membersHSU CHARLES J·Filed 1981·Granted May 15, 1984·6 cites·9 claims
Join the waitlist — get patent alerts
Get an alert when HSU CHARLES 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 →