P

Inventor

SIEFER DAVID A

7 patents
⚠️ This page may combine multiple inventors who share the name “SIEFER DAVID A”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

SUMMAGRAPHICS CORP

3 patents
US5153386AOct 6, 1992

Digitizer tablet with illuminable working surface

SUMMAGRAPHICS CORP29 citations91
US4943689AJul 24, 1990

Backlit digitizer tablet

SUMMAGRAPHICS CORP36 citations91
US5028744AJul 2, 1991

Digitizer with illuminable working surface

SUMMAGRAPHICS CORP12 citations72

GTE PROD CORP

2 patents
US4406785ASep 27, 1983

Diesel fuel heater

GTE PROD CORP54 citations94
US4384563AMay 24, 1983

Apparatus for redirection of fuel-air mixture in carburetion system

GTE PROD CORP38 citations86

HID CORP

1 patent
US6191687B1Feb 20, 2001

Wiegand effect energy generator

HID CORP89 citations92

WARNER LAMBERT CO

1 patent
US5012578AMay 7, 1991

One-piece razor with hinged sliding cap

WARNER LAMBERT CO33 citations91