Inventor · disambiguated record
Martin Hewitt
Also filed as: HEWITT MARTIN
7 granted patents·107 citations·filing 1975–2020
85Inventor score
Top patents by PatentIndex Score
7 records- 0190US7418860B2Ultrasonic fluid level sensorPARKER HANNIFIN CORP·Filed 2005·Granted Sep 2, 2008·28 cites·24 claims
- 0277US5996407AMulti-frequency ultrasonic liquid level gauging systemPARKER HANNIFIN CORP·Filed 1997·Granted Dec 7, 1999·46 cites·27 claims
- 0367US4262531AFluid-gauging methods and systemsSMITHS INDUSTRIES LTD·Filed 1979·Granted Apr 21, 1981·18 cites·14 claims
- 0462USD990901SStacking stoolSCHOOL SPECIALTY LLC·Filed 2020·Granted Jul 4, 2023·4 cites·1 claims
- 0556US4004276ATelephone answering machinesANSAFONE LTD·Filed 1975·Granted Jan 18, 1977·9 cites·14 claims
- 0650USD988735SStacking stoolSCHOOL SPECIALTY LLC·Filed 2020·Granted Jun 13, 2023·2 cites·1 claims
- 0725US4134141ARecording and reproducing meansANSAFONE LTD·Filed 1977·Granted Jan 9, 1979·0 cites·6 claims
Join the waitlist — get patent alerts
Get an alert when Martin Hewitt files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →