Inventor · disambiguated record
Richard L. Marcengill
Also filed as: MARCENGILL RICHARD L
4 granted patents·231 citations·filing 1996–1997
82Inventor score
Files withPOWER TOOL HOLDERS INC4
Top patents by PatentIndex Score
4 records- 0196US5992538AImpact tool driverPOWER TOOL HOLDERS INC·Filed 1997·Granted Nov 30, 1999·106 cites·18 claims
- 0287US5921563AQuick release integrated collet and chuck devicePOWER TOOL HOLDERS INC·Filed 1997·Granted Jul 13, 1999·64 cites·19 claims
- 0375US5908076AImpact tool driverPOWER TOOL HOLDERS INC·Filed 1997·Granted Jun 1, 1999·39 cites·11 claims
- 0456US5704616ALever actuated keyless chuckPOWER TOOL HOLDERS INC·Filed 1996·Granted Jan 6, 1998·22 cites·20 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →