Inventor · disambiguated record
Douglas Campbell
Also filed as: CAMPBELL DOUGLAS · CAMPBELL DOUGLAS O
3 granted patents·118 citations·filing 1993–2017
75Inventor score
Top patents by PatentIndex Score
3 records- 0185US10014006B1Method of determining whether a phone call is answered by a human or by an automated deviceAMPERSAND INC·Filed 2017·Granted Jul 3, 2018·9 cites·24 claims
- 0279US5766114AInfant walking and swimming aidFiled 1995·Granted Jun 16, 1998·75 cites·20 claims
- 0353US5356355AFully adjustable infant walking aideCAMPBELL DOUGLAS·Filed 1993·Granted Oct 18, 1994·34 cites·14 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →