Inventor
HAYASE SEIJI
JP24 patents
⚠️ This page may combine multiple inventors who share the name “HAYASE SEIJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SUMITOMO RUBBER IND
12 patentsUS10850171B2Dec 1, 2020
Golf club head
SUMITOMO RUBBER IND3 citations73
US10828542B2Nov 10, 2020
Golf club head
SUMITOMO RUBBER IND3 citations73
US10632355B2Apr 28, 2020
Golf club
SUMITOMO RUBBER IND1 citations72
US10434387B2Oct 8, 2019
Golf club
SUMITOMO RUBBER IND2 citations72
US10335657B2Jul 2, 2019
Golf club
SUMITOMO RUBBER IND3 citations72
US10220278B2Mar 5, 2019
Golf club
SUMITOMO RUBBER IND3 citations72
US11207574B2Dec 28, 2021
Golf club head
SUMITOMO RUBBER IND0 citations62
US11123618B2Sep 21, 2021
Golf club
SUMITOMO RUBBER IND0 citations62
US12161918B2Dec 10, 2024
Golf club head
SUMITOMO RUBBER IND0 citations58
US12409368B2Sep 9, 2025
Golf club head
SUMITOMO RUBBER IND0 citations52
US12458851B2Nov 4, 2025
Golf club head and method for manufacturing the same
SUMITOMO RUBBER IND0 citations47
US11311782B2Apr 26, 2022
Golf club head
SUMITOMO RUBBER IND0 citations47
DUNLOP SPORTS CO LTD
7 patentsUS9220955B2Dec 29, 2015
Golf club head and method for manufacturing the same
DUNLOP SPORTS CO LTD21 citations92
US9174098B2Nov 3, 2015
Golf club head
DUNLOP SPORTS CO LTD26 citations92
US10427009B2Oct 1, 2019
Multi-piece golf ball
DUNLOP SPORTS CO LTD0 citations42
US10864411B2Dec 15, 2020
Golf club
DUNLOP SPORTS CO LTD0 citations41
US9795841B2Oct 24, 2017
Golf club
DUNLOP SPORTS CO LTD0 citations41
US9776055B2Oct 3, 2017
Golf club
DUNLOP SPORTS CO LTD0 citations41
US9586107B2Mar 7, 2017
Golf club
DUNLOP SPORTS CO LTD0 citations41