Inventor · disambiguated record
Thorvald Madland
Also filed as: MADLAND THORVALD
5 granted patents·45 citations·filing 1974–1981
79Inventor score
Files withYOUNGSTOWN STEEL DOOR CO5
Top patents by PatentIndex Score
5 records- 0164US3938446ADoor assemblies for closing rail car end openingsYOUNGSTOWN STEEL DOOR CO·Filed 1974·Granted Feb 17, 1976·17 cites·29 claims
- 0242US4178857ARail house car door wear skidsYOUNGSTOWN STEEL DOOR CO·Filed 1977·Granted Dec 18, 1979·10 cites·7 claims
- 0338US4344366ARailway car door driverYOUNGSTOWN STEEL DOOR CO·Filed 1979·Granted Aug 17, 1982·6 cites·6 claims
- 0437US4390196ASliding door starter and closerYOUNGSTOWN STEEL DOOR CO·Filed 1981·Granted Jun 28, 1983·7 cites·5 claims
- 0533US4162591ADoor driverYOUNGSTOWN STEEL DOOR CO·Filed 1977·Granted Jul 31, 1979·5 cites·1 claims
Join the waitlist — get patent alerts
Get an alert when Thorvald Madland 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 →