Inventor · Yokohama, JP

Koichi Oyamada

6Patents
5h-index
7Co-inventors
45Inventor score

Filing activity: Sep 29, 1987 → Feb 13, 1991

Most-cited inventions

PatentTitleAreaCited byStatus
US4880719A Two component electrophotographic developer Physics 59 Expired
US4933251A Electrophotographic developer Physics 22 Expired
US4837100A Electrophotographic developer containing positively chargeable toner Physics 10 Expired
US5032483A Electrophotographic red toner Physics 8 Expired
US4965162A Electrophotographic developer containing tin oxide Emerging Cross-Sectional Technologies 7 Expired
US5252421A Electrophotographic toner Physics 3 Expired

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