Inventor · disambiguated record
Thomas M. Hartzell
Also filed as: HARTZELL THOMAS M
3 granted patents·11 citations·filing 1990–1992
63Inventor score
Files withWESTINGHOUSE AIR BRAKE CO3
Top patents by PatentIndex Score
3 records- 0135US5211451AAdjustable regulating device for a railway locomotive brake valve apparatusWESTINGHOUSE AIR BRAKE CO·Filed 1992·Granted May 18, 1993·5 cites·11 claims
- 0226US5246502AMethod of cleaning valve bushingsWESTINGHOUSE AIR BRAKE CO·Filed 1992·Granted Sep 21, 1993·4 cites·6 claims
- 0323US5146939AValve bushing cleaning device and method of cleaning valve bushingsWESTINGHOUSE AIR BRAKE CO·Filed 1990·Granted Sep 15, 1992·2 cites·14 claims
Join the waitlist — get patent alerts
Get an alert when Thomas M. Hartzell 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 →