Inventor

SUMIDA TATSUO

JP2 patents

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

CITIZEN HOLDINGS CO LTD

1 patent

US8345514B2Jan 1, 2013

Radio-controlled timepiece and method of assembling the same

CITIZEN HOLDINGS CO LTD6 citations69

SUMIDA TATSUO

1 patent

US9010997B2Apr 21, 2015

Electronic timepiece

SUMIDA TATSUO0 citations33