AK

Akihisa Kawamura

Sumitomo Electric Industries: 3 patents #99 of 2,038Top 5%
Overall (1997): #9,123 of 185,788Top 5%
4
Patents 1997

Issued Patents 1997

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
5700153 Relay device for rotating members Satoshi Ishikawa, Hiroaki Iizuka 1997-12-23
5684881 Sound field and sound image control apparatus and method Mitsuhiko Serikawa, Ryou Tagami, Masaharu Matsumoto, Mikio Oda, Hiroko Numazu 1997-11-04
5677987 Feedback detector and suppressor Nobuyuki Seki, Kazuhiro Onizuka 1997-10-14
5617478 Sound reproduction system and a sound reproduction method Ryou Tagami, Takeshi Norimatsu, Masaharu Matsumoto, Mikio Oda, Mitsuhiko Serikawa +1 more 1997-04-01