Inventor · disambiguated record

Douglas F. Johnston

Also filed as: JOHNSTON DOUGLAS F

1 granted patent·6 citations·filing 2010–2010

27Inventor score

Technology areasA63B

Files withJOHNSTON DOUGLAS F1

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1 record

0156US8192297B1Variable interface putter golf club with attachable device for analyzing golf course conditions and selecting putter faceJOHNSTON DOUGLAS F·Filed 2010·Granted Jun 5, 2012·6 cites·17 claims

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