Inventor · disambiguated record
Donald L. Friend
Also filed as: FRIEND DONALD L
4 granted patents·36 citations·filing 1976–1979
74Inventor score
Technology areasC10B
Files withUNITED STATES STEEL CORP4
Top patents by PatentIndex Score
4 records- 0177US4141299ADumping railway quench carUNITED STATES STEEL CORP·Filed 1977·Granted Feb 27, 1979·26 cites·2 claims
- 0240US4039394ASlatted top quench carUNITED STATES STEEL CORP·Filed 1976·Granted Aug 2, 1977·3 cites·25 claims
- 0338US4213829ARetractable hood for transfer of cokeUNITED STATES STEEL CORP·Filed 1979·Granted Jul 22, 1980·4 cites·6 claims
- 0438US4096041ASingle-spot quench carUNITED STATES STEEL CORP·Filed 1977·Granted Jun 20, 1978·3 cites·8 claims
Join the waitlist — get patent alerts
Get an alert when Donald L. Friend 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 →