Inventor · El Cajon, CA, US

John Francis Lorentzen

45Patents
15h-index
26Co-inventors
81Inventor score

Filing activity: Oct 26, 1993 → Oct 3, 2023

Most-cited inventions

PatentTitleAreaCited byStatus
US7419441B2 Golf club head weight reinforcement Human Necessities 456 Expired
US7713142B2 Golf club head weight reinforcement Human Necessities 271 Active
USD539862S1 Golf club iron General 71 Expired
US8608591B2 Golf club head Human Necessities 70 Active
USD518538S1 Golf club head General 66 Expired
US8444504B2 Golf club head Human Necessities 53 Active
USD539863S1 Golf club iron General 50 Expired
US9162115B1 Golf club head Human Necessities 45 Active
USD553699S1 Golf club head General 43 Expired
US9861864B2 Golf club Human Necessities 31 Active
US9174099B2 Golf club face Human Necessities 30 Active
US8747250B2 Golf club head Human Necessities 23 Active
US8491408B2 Golf club shaft Human Necessities 20 Active
US10195497B1 Oversized golf club head and golf club Human Necessities 18 Active
US9750991B2 Golf club head Human Necessities 17 Active
USD556279S1 Golf club head General 14 Expired
US9278267B2 Golf club head Human Necessities 11 Active
US10888746B1 Oversized golf club head and golf club Human Necessities 10 Active
US5568921A Racquet stringing machine Human Necessities 10 Expired
US10632350B2 Golf club head Human Necessities 10 Active
US8747247B2 Golf club shaft Emerging Cross-Sectional Technologies 8 Active
US9375619B2 Golf club shaft Human Necessities 5 Active
US10569145B2 Golf club Human Necessities 5 Active
US9457243B2 Golf club head Human Necessities 5 Active
US10828540B2 Golf club Human Necessities 4 Active

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.