Inventor · disambiguated record
William M. Schiffmacher
Also filed as: SCHIFFMACHER WILLIAM M
4 granted patents·35 citations·filing 1977–1989
75Inventor score
Technology areasB41J
Top patents by PatentIndex Score
4 records- 0164US4126715AMethod and apparatus for reinking typing ribbon cartridgesUNITED RECYCLE INC·Filed 1977·Granted Nov 21, 1978·17 cites·7 claims
- 0255USD274178SRibbon cartridgeASPEN RIBBONS INC·Filed 1983·Granted Jun 5, 1984·7 cites·1 claims
- 0347USD281258SPrinter ribbon cartridgeASPEN RIBBONS INC·Filed 1983·Granted Nov 5, 1985·5 cites·1 claims
- 0440US4948278AReplaceable ribbon guide for dot matrix printersASPEN RIBBONS INC·Filed 1989·Granted Aug 14, 1990·6 cites·16 claims
Join the waitlist — get patent alerts
Get an alert when William M. Schiffmacher 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 →