YY

Yokoyama Yoshimasa

HZ Hitachi Zosen: 1 patents #216 of 531Top 45%
YC Yokoyama Sankoh Co.: 1 patents #3 of 3Top 100%
Overall (All Time): #3,683,699 of 4,157,543Top 90%
1
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Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5750235 Base board for layered corrugated fiberboard structure — 1998-05-12