YI

Yoshinori Ishizawa

HC Hitachi Koki Co.: 25 patents #22 of 888Top 3%
HI Hitachi: 1 patents #17,742 of 28,497Top 65%
HC Hitachi Koko Co.: 1 patents #1 of 33Top 4%
KC Koki Holdings Co.: 1 patents #124 of 215Top 60%
📍 Ibaraki, JP: #227 of 6,779 inventorsTop 4%
Overall (All Time): #138,384 of 4,157,543Top 4%
28
Patents All Time

Issued Patents All Time

Showing 26–28 of 28 patents

Patent #TitleCo-InventorsDate
5647525 Driver blade for a percussion tool 1997-07-15
5495973 Nail gun having safety device for preventing accidental firings Katsuaki Tobita 1996-03-05
5090606 Combustion gas powered fastener driving tool Takuji Torii, Hiromu Utsumi, Shinki Ohtsu, Yo Kawakami, Teruo Suzuki +3 more 1992-02-25