Inventor · disambiguated record
Douglas J. Calvin
Also filed as: CALVIN DOUGLAS · CALVIN DOUGLAS J
11 granted patents·3 pending applications·129 citations·filing 1980–2019
89Inventor score
Files withBELANGER INC5MOTOR CITY WASH WORKS INC4BELANGER IND PRODUCTS INC2WENTWORTH ROBERT J2CALVIN DOUGLAS1
Top patents by PatentIndex Score
14 records- 0186US7347771B2Flap-type rotary finishing deviceWENTWORTH ROBERT J·Filed 2006·Granted Mar 25, 2008·10 cites·24 claims
- 0276US4432406APower operated bi-fold strip curtain door assemblyBELANGER INC·Filed 1981·Granted Feb 21, 1984·38 cites·7 claims
- 0372US4427049APower operated bi-fold strip curtain door assemblyBELANGER INC·Filed 1980·Granted Jan 24, 1984·33 cites·6 claims
- 0469US6949019B2Flap-type rotary finishing deviceBELANGER IND PRODUCTS INC·Filed 2004·Granted Sep 27, 2005·9 cites·13 claims
- 0564US9315172B1Conveyor assembly including a trapdoor assembly having a deviceMOTOR CITY WASH WORKS INC·Filed 2015·Granted Apr 19, 2016·2 cites·22 claims
- 0663US4552297ARotatable reloading apparatus for a staplerBELANGER INC·Filed 1983·Granted Nov 12, 1985·18 cites·6 claims
- 0760US2011081849A1Flap-type rotary finishing deviceWENTWORTH ROBERT J·Filed 2009·Application pending·0 cites
- 0857US6368187B2Abrading/polishing device and method of making and using sameBELANGER INC·Filed 2001·Granted Apr 9, 2002·6 cites·3 claims
- 0951US4369541ARetractable wax, buff and polish apparatus for carsBELANGER INC·Filed 1981·Granted Jan 25, 1983·13 cites·26 claims
- 1050US2005272358A1Flap-type rotary finishing deviceBELANGER IND PRODUCTS INC·Filed 2005·Application pending·0 cites
- 1147US7784140B2Vehicle wash mitter assembly with offset racksMOTOR CITY WASH WORKS INC·Filed 2008·Granted Aug 31, 2010·0 cites·25 claims
- 1244US2006102756A1Adjustable spray applicator for vehicle washing applicationsCALVIN DOUGLAS·Filed 2005·Application pending·0 cites
- 1342US11260833B2Dolly assembly for a conveyor systemMOTOR CITY WASH WORKS INC·Filed 2019·Granted Mar 1, 2022·0 cites·12 claims
- 1430US10458607B2Lighting device for a component of a vehicle wash systemMOTOR CITY WASH WORKS INC·Filed 2018·Granted Oct 29, 2019·0 cites·16 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →