YH

Yasuharu Hakamatsuka

OC Olympus Optical Co.: 3 patents #20 of 349Top 6%
Overall (1994): #7,404 of 165,921Top 5%
3
Patents 1994

Issued Patents 1994

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
5346396 Dental prosthesis 1994-09-13
5322675 Method of preparing calcium phosphate Hiroyuki Irie, Sukezo Kawamura, Motohiro Toriyama 1994-06-21
5318779 Drug-impregnated ceramic Hiroyuki Irie 1994-06-07