Keiji Yamamoto

KC Kobelco Construction Machinery Co.: 28 patents #5 of 422Top 2%

KT Kabushiki Kaisha Toshiba: 17 patents #1,748 of 21,451Top 9%

TO Toyota: 15 patents #1,771 of 26,838Top 7%

FI Fujifilm Business Innovation: 14 patents #644 of 5,238Top 15%

Mitsubishi Electric: 6 patents #4,940 of 25,717Top 20%

ND Nitto Denko: 4 patents #785 of 2,479Top 35%

Ricoh Company: 4 patents #4,167 of 9,818Top 45%

FU Fujifilm: 4 patents #1,747 of 4,519Top 40%

AC Ando Electric Co.: 2 patents #91 of 301Top 35%

Honda Motor Co.: 2 patents #8,527 of 21,052Top 45%

HC Hokuriku Seiyaku Co.: 2 patents #9 of 29Top 35%

Bridgestone: 2 patents #1,066 of 2,860Top 40%

DI Drug Delivery System Institute: 2 patents #8 of 35Top 25%

MI Mitsui Toatsu Chemicals, Incorporated: 1 patents #880 of 1,543Top 60%

TS Takai Rika Denki Seisakusho: 1 patents #34 of 190Top 20%

Aisin Seiki Kabushiki Kaisha: 1 patents #2,094 of 3,782Top 60%

NC Nisshin Steel Co.: 1 patents #240 of 514Top 50%

SS Sanden Automotive Climate Systems: 1 patents #11 of 20Top 60%

SC Sanyo Electric Co.: 1 patents #3,644 of 6,347Top 60%

SC Shin-Etsu Chemical Co.: 1 patents #1,340 of 2,176Top 65%

TS Toshiba Infrastructure Systems & Solutions: 1 patents #186 of 424Top 45%

Yamaha Motor: 1 patents #1,283 of 2,310Top 60%

📍 Hiroshima, MI: #2 of 7 inventorsTop 30%

Overall (All Time): #13,587 of 4,157,543Top 1%

103

Patents All Time

Issued Patents All Time

Showing 101–103 of 103 patents

Patent #	Title	Co-Inventors	Date
4744745	Variable contour rubber extruder	Jumei Harada, Takashi Yokoi	1988-05-17
4733588	Guide regulator plate for vegetable preparing devices	—	1988-03-29
4576563	Rotary roll-type rubber extruder	Jumei Harada, Takashi Yokoi	1986-03-18