Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
EO

Eiji Okada

Panasonic: 6 patents #4,438 of 21,108Top 25%
YAYazaki: 4 patents #1,022 of 3,427Top 30%
Mazda Motor: 4 patents #991 of 4,755Top 25%
SKShinano Kenshi: 3 patents #9 of 113Top 8%
Sumitomo Electric Industries: 3 patents #7,735 of 21,551Top 40%
MOMolten: 2 patents #13 of 73Top 20%
SKSekisui Kagaku Kogyo: 1 patents #148 of 395Top 40%
Canon: 1 patents #14,899 of 19,416Top 80%
Ford: 1 patents #9,341 of 17,473Top 55%
OSOlympus Medical Systems: 1 patents #501 of 833Top 65%
KUKeio University: 1 patents #190 of 781Top 25%
KUKyoto University: 1 patents #568 of 1,688Top 35%
MIMitutoyo: 1 patents #455 of 721Top 65%
NTNTT: 1 patents #2,911 of 4,871Top 60%
ACAlps Electric Co.: 1 patents #1,191 of 2,177Top 55%
Overall (All Time): #107,248 of 4,157,543Top 3%
33 Patents All Time

Issued Patents All Time

Showing 26–33 of 33 patents

Patent #TitleCo-InventorsDate
5709249 Locking structure Tomoyasu Murakami, Mitsunari Tashiro 1998-01-20
5706542 Electrically driven toothbrush 1998-01-13
D385702 Electric toothbrush 1997-11-04
5617602 Motor-driven toothbrush 1997-04-08
D375204 Electric toothbrush handle 1996-11-05
5421726 Tooth-brushing method by an electric toothbrush having a predetermined vibration frequency 1995-06-06
D307491 Combined electric shaver and cap therefor 1990-04-24
D289576 Vacuum cleaner Motoi Furuta 1987-04-28