Inventor · Santa Clara, CA, US

Ralph C. Wolf

24Patents
18h-index
25Co-inventors
81Inventor score

Filing activity: Apr 23, 1984 → Nov 13, 2012

Most-cited inventions

PatentTitleAreaCited byStatus
US5880411A Object position detector with edge motion feature and gesture recognition Physics 2,148 Expired
US5488204A Paintbrush stylus for capacitive touch sensor pad Physics 2,059 Expired
US5543591A Object position detector with edge motion feature and gesture recognition Physics 695 Expired
US6414671B1 Object position detector with edge motion feature and gesture recognition Physics 505 Expired
US6380931B1 Object position detector with edge motion feature and gesture recognition Physics 485 Expired
US6610936B2 Object position detector with edge motion feature and gesture recognition Physics 448 Expired
US6028271A Object position detector with edge motion feature and gesture recognition Physics 332 Expired
US7109978B2 Object position detector with edge motion feature and gesture recognition Physics 239 Expired
US6750852B2 Object position detector with edge motion feature and gesture recognition Physics 213 Expired
US5076692A Particle detection on a patterned or bare wafer surface Physics 113 Expired
US7450113B2 Object position detector with edge motion feature and gesture recognition Physics 82 Active
US7532205B2 Object position detector with edge motion feature and gesture recognition Physics 62 Active
US7911456B2 Object position detector with edge motion feature and gesture recognition Physics 62 Active
US5241366A Thin film thickness monitor Physics 43 Expired
US5276498A Adaptive spatial filter for surface inspection Physics 41 Expired
US6002122A High-speed logarithmic photo-detector Electricity 39 Expired
US7812829B2 Object position detector with edge motion feature and gesture recognition Physics 27 Active
US6833913B1 Apparatus and methods for optically inspecting a sample for anomalies Physics 20 Expired
US6177665A High-speed logarithmic photo-detector Electricity 14 Expired
US7106434B1 Inspection tool Physics 10 Expired
US7012683B2 Apparatus and methods for optically inspecting a sample for anomalies Physics 6 Expired
US4601504A Safety mechanism for high security lock Emerging Cross-Sectional Technologies 3 Expired
US7907127B2 Object position detector with edge motion feature and gesture recognition Physics 2 Active
US9389166B2 Enhanced high-speed logarithmic photo-detector for spot scanning system Physics 0 Active

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