Nikon ED Glass - cameragossip/cameragossip.github.io GitHub Wiki

Was it this guy: Takeo Ichimura He had patents under Nippon Chemical and then jointly with Nippon Kogaku.

PC102

https://worldwide.espacenet.com/patent/search?q=pn%3DJPS49130409A

https://patents.google.com/?inventor=Takeo+Ichimura&sort=old&page=1