Inventor
YOSHIKAWA HISAMITSU
JP7 patents
Patents
7 patentsUS7192182B2Mar 20, 2007
Winding stem pipe with friction ring
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Portable watch
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US6821014B2Nov 23, 2004
Rotating-type bezel apparatus and portable timepiece having rotating-type bezel apparatus
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US7357569B2Apr 15, 2008
Crown lock structure and timepiece having crown lock structure
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US7118270B2Oct 10, 2006
Portable watch
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US7052173B2May 30, 2006
Timepiece
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US6886975B2May 3, 2005
Watch
SEIKO INSTR INC6 citations61