Masao Kubota

HC Hitachi Chemical Company: 4 patents #392 of 1,946Top 25%

PA Panasonic: 4 patents #6,180 of 21,108Top 30%

FC Fuji Kasei Kogyo Co.: 2 patents #3 of 14Top 25%

FC Fuji Electric Co.: 1 patents #1,354 of 2,643Top 55%

YA Yazaki: 1 patents #2,077 of 3,427Top 65%

📍 Ibaraki, JP: #207 of 6,779 inventorsTop 4%

Overall (All Time): #130,541 of 4,157,543Top 4%

Patents All Time

Issued Patents All Time

Showing 26–29 of 29 patents

Patent #	Title	Co-Inventors	Date
5078554	Drill	—	1992-01-07
4688972	Twist drill	—	1987-08-25
4586858	Rotary cutting tool	—	1986-05-06
4541756	Revolving cutting tool	—	1985-09-17