P

Inventor

HIRAOKA TAKESHI

22 patents
⚠️ This page may combine multiple inventors who share the name “HIRAOKA TAKESHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

NIPPON PISTON RING CO LTD

14 patents

CANON KK

6 patents

NAGAO CHUMA

1 patent

SEIKO WATCH KK

1 patent