Inventor · North Royalton, OH, US

Frederick Hetzel

9Patents
5h-index
17Co-inventors
60Inventor score

Filing activity: Jun 13, 1979 → Nov 16, 1998

Most-cited inventions

PatentTitleAreaCited byStatus
US6084359A Coil assembly for an electrodeless fluorescent lamp Electricity 111 Expired
US4258287A Circular fluorescent lamp unit Electricity 23 Expired
US4928032A Means for converting a lamp with a screw-type base into a lamp with a bi-pin base Electricity 11 Expired
US6232707A Wedge base lamp Electricity 7 Expired
USD391650S Fluorescent lamp General 7 Expired
US5440199A Base for electrodeless discharge lamp Electricity 4 Expired
US4525230A Method of manufacturing a ballast resistor support member Electricity 2 Expired
US4447861A Circular fluorescent lamp unit Mechanical Engineering; Lighting; Heating 1 Expired
US4418328A Method of manufacturing a ballast resistor support member and finished article Electricity 0 Expired

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