P

Inventor

HAMADA MASAFUMI

JP7 patents
⚠️ This page may combine multiple inventors who share the name “HAMADA MASAFUMI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

SONY CORP

4 patents

MITSUBISHI PENCIL CO

1 patent

MITSUBISHI PENCIL KABUSHIKIKAI

1 patent

TSURUKAWA NAOKI

1 patent