Inventor
TSUMIYAMA AKIRA
JP19 patents
⚠️ This page may combine multiple inventors who share the name “TSUMIYAMA AKIRA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SHIMANO KK
14 patentsUS6647823B2Nov 18, 2003
Bicycle control device
SHIMANO KK83 citations98
US7650813B2Jan 26, 2010
Position control mechanism for bicycle control device
SHIMANO KK22 citations92
US7526979B2May 5, 2009
Bicycle shift position control mechanism
SHIMANO KK23 citations92
US7219574B2May 22, 2007
Hydraulic gear shift mechanism
SHIMANO KK14 citations92
US7124873B2Oct 24, 2006
Shift and brake control device
SHIMANO KK22 citations92
US7032475B2Apr 25, 2006
Hydraulic gear shift mechanism
SHIMANO KK14 citations92
US6691591B2Feb 17, 2004
Bicycle control device
SHIMANO KK30 citations92
US7509888B2Mar 31, 2009
Hydraulic gear shift mechanism
SHIMANO KK8 citations84
US7392723B2Jul 1, 2008
Bicycle shift control mechanism
SHIMANO KK11 citations84
US7062989B2Jun 20, 2006
Bicycle control device
SHIMANO KK11 citations84
US7137314B2Nov 21, 2006
Hydraulic gear shift mechanism
SHIMANO KK9 citations74
US7802489B2Sep 28, 2010
Bicycle control device
SHIMANO KK7 citations73
US7267026B2Sep 11, 2007
Bicycle control device
SHIMANO KK5 citations63
US7228756B2Jun 12, 2007
Bicycle control device
SHIMANO KK5 citations62
TSUMIYAMA AKIRA
4 patentsUS8201476B2Jun 19, 2012
Bicycle operating device
TSUMIYAMA AKIRA88 citations96
US8695454B2Apr 15, 2014
Bicycle operating device
TSUMIYAMA AKIRA8 citations83
US8181553B2May 22, 2012
Position control mechanism for bicycle control device
TSUMIYAMA AKIRA11 citations83
US8413543B2Apr 9, 2013
Bicycle operating unit connector
TSUMIYAMA AKIRA1 citations61