MK

Masanao Kawahara

PE Pentax: 1 patents #515 of 761Top 70%
AK Asahi Kogaku Kogyo K.K.: 1 patents #76 of 180Top 45%
Overall (All Time): #2,245,691 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
RE36049 Cemented lens and process for production thereof Yosio Kamekura 1999-01-19
5162825 Cemented lens and process for production thereof Yosio Kamekura 1992-11-10