Inventor · disambiguated record
David A. Siefer
Also filed as: SIEFER DAVID · SIEFER DAVID A
9 granted patents·371 citations·filing 1981–1998
91Inventor score
Top patents by PatentIndex Score
9 records- 0188US4406785ADiesel fuel heaterGTE PROD CORP·Filed 1981·Granted Sep 27, 1983·54 cites·10 claims
- 0286US6191687B1Wiegand effect energy generatorHID CORP·Filed 1998·Granted Feb 20, 2001·89 cites·21 claims
- 0386US4384563AApparatus for redirection of fuel-air mixture in carburetion systemGTE PROD CORP·Filed 1981·Granted May 24, 1983·38 cites·16 claims
- 0471US5581052APressure sensitive stylus having resiliently compressible tip elementSUMMAGRAPHICS CORP·Filed 1995·Granted Dec 3, 1996·72 cites·13 claims
- 0569US5012578AOne-piece razor with hinged sliding capWARNER LAMBERT CO·Filed 1984·Granted May 7, 1991·33 cites·10 claims
- 0666US4943689ABacklit digitizer tabletSUMMAGRAPHICS CORP·Filed 1989·Granted Jul 24, 1990·36 cites·15 claims
- 0755US5153386ADigitizer tablet with illuminable working surfaceSUMMAGRAPHICS CORP·Filed 1991·Granted Oct 6, 1992·29 cites·28 claims
- 0839US5028744ADigitizer with illuminable working surfaceSUMMAGRAPHICS CORP·Filed 1990·Granted Jul 2, 1991·12 cites·48 claims
- 0938US5191480AOptical accessory for digitizer cursorsSUMMAGRAPHICS CORP·Filed 1989·Granted Mar 2, 1993·8 cites·3 claims
Join the waitlist — get patent alerts
Get an alert when David A. Siefer 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 →