Inventor · disambiguated record
Alexander M. Purcell
Also filed as: PURCELL ALEXANDER M
12 granted patents·434 citations·filing 1989–1992
93Inventor score
Technology areasG06F
Files withSUMMAGRAPHICS CORP12
Top patents by PatentIndex Score
12 records- 0187US5065145AMethod and apparatus for producing signals corresponding to the position of a cursorSUMMAGRAPHICS CORP·Filed 1989·Granted Nov 12, 1991·95 cites·12 claims
- 0285US4999462APosition determining and digitizing method and deviceSUMMAGRAPHICS CORP·Filed 1989·Granted Mar 12, 1991·82 cites·15 claims
- 0374US4952757ALow-power electromagnetic digitizer tabletSUMMAGRAPHICS CORP·Filed 1989·Granted Aug 28, 1990·49 cites·10 claims
- 0467US5004871ADigitizer stylus having side switchSUMMAGRAPHICS CORP·Filed 1989·Granted Apr 2, 1991·34 cites·27 claims
- 0566US4943689ABacklit digitizer tabletSUMMAGRAPHICS CORP·Filed 1989·Granted Jul 24, 1990·36 cites·15 claims
- 0658US5001306ADistributed optical fiber device for digitizer tabletSUMMAGRAPHICS CORP·Filed 1990·Granted Mar 19, 1991·34 cites·26 claims
- 0757US4977315ALiquid crystal position determining system and wand deviceSUMMAGRAPHICS CORP·Filed 1989·Granted Dec 11, 1990·23 cites·11 claims
- 0855US5153386ADigitizer tablet with illuminable working surfaceSUMMAGRAPHICS CORP·Filed 1991·Granted Oct 6, 1992·29 cites·28 claims
- 0946US5061828ADigitizer stylus with Z-axis side pressure controlSUMMAGRAPHICS CORP·Filed 1990·Granted Oct 29, 1991·18 cites·10 claims
- 1041US5109141ADigitizer stylus with z-axis side controlSUMMAGRAPHICS CORP·Filed 1990·Granted Apr 28, 1992·13 cites·14 claims
- 1139US5028744ADigitizer with illuminable working surfaceSUMMAGRAPHICS CORP·Filed 1990·Granted Jul 2, 1991·12 cites·48 claims
- 1237US5173793ALiquid crystal shutter for backlit digitizerSUMMAGRAPHICS CORP·Filed 1992·Granted Dec 22, 1992·9 cites·7 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →