Inventor
SHIRAI MASAMI
JP42 patents
⚠️ This page may combine multiple inventors who share the name “SHIRAI MASAMI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
ASAHI OPTICAL CO LTD
21 patentsUS6324024B1Nov 27, 2001
Reflector for distance measurement
ASAHI OPTICAL CO LTD104 citations98
US5949548ASep 7, 1999
Height sensing measurement device
ASAHI OPTICAL CO LTD57 citations96
US4971034ANov 20, 1990
Body cavity pressure adjusting device for endoscope and laser medical treatment apparatus including body cavity pressure adjusting device
ASAHI OPTICAL CO LTD260 citations96
US6354010B1Mar 12, 2002
Surveying instrument
ASAHI OPTICAL CO LTD20 citations92
US6072642AJun 6, 2000
Focusing lens position detection apparatus and an auto-focus surveying apparatus
ASAHI OPTICAL CO LTD34 citations92
US5671466ASep 23, 1997
Electrophotographic apparatus and sheet guide mechanism
ASAHI OPTICAL CO LTD28 citations92
US5528352AJun 18, 1996
Electrophotographic apparatus having original separation means
ASAHI OPTICAL CO LTD22 citations92
US5321479AJun 14, 1994
Electrophotographic apparatus
ASAHI OPTICAL CO LTD26 citations92
US6304079B1Oct 16, 2001
Incremental rotary encoder for measuring horizontal or vertical angles
ASAHI OPTICAL CO LTD44 citations91
US6480266B2Nov 12, 2002
Autofocus distance-measuring optical system
ASAHI OPTICAL CO LTD13 citations74
US6339499B1Jan 15, 2002
Beam splitter for automatic focusing device
ASAHI OPTICAL CO LTD12 citations74
US6194694B1Feb 27, 2001
Surveying instrument
ASAHI OPTICAL CO LTD14 citations74
US5992031ANov 30, 1999
Handgrip supporting mechanism for electric devices
ASAHI OPTICAL CO LTD8 citations74
US5338021AAug 16, 1994
Paper feeding mechanism
ASAHI OPTICAL CO LTD12 citations74
US5297787AMar 29, 1994
Sheet cassette
ASAHI OPTICAL CO LTD18 citations74
US5452072ASep 19, 1995
Transfer unit mounted on a pivotal upper cover
ASAHI OPTICAL CO LTD9 citations73
US6384405B1May 7, 2002
Incremental rotary encoder
ASAHI OPTICAL CO LTD12 citations72
US6469777B2Oct 22, 2002
Surveying instrument having an optical distance meter
ASAHI OPTICAL CO LTD4 citations63
US6344639B1Feb 5, 2002
Beam splitter for automatic focusing device
ASAHI OPTICAL CO LTD3 citations63
US6331918B1Dec 18, 2001
Light interception structure for an automatic focus detection surveying instrument
ASAHI OPTICAL CO LTD5 citations63
US6350975B1Feb 26, 2002
Beam splitter for automatic focusing device
ASAHI OPTICAL CO LTD1 citations52
PENTAX CORP
21 patentsUS6765653B2Jul 20, 2004
Electronic distance meter
PENTAX CORP56 citations96
US6622391B1Sep 23, 2003
Incremental rotary encoder, and a surveying instrument incorporating a magnetic incremental rotary encoder
PENTAX CORP33 citations92
US6717683B1Apr 6, 2004
Target for photogrammetric analytical measurement system
PENTAX CORP15 citations84
US6580495B2Jun 17, 2003
Surveying instrument having a phase-difference detection type focus detecting device and a beam-splitting optical system
PENTAX CORP17 citations84
US6492806B2Dec 10, 2002
Magnetic encoder and survey instrument having magnetic encoder
PENTAX CORP16 citations84
US7218384B2May 15, 2007
Surveying system
PENTAX CORP16 citations83
US7075634B2Jul 11, 2006
Surveying system
PENTAX CORP13 citations83
US6550150B1Apr 22, 2003
Surveying instrument incorporating a magnetic incremental rotary encoder
PENTAX CORP18 citations83
US7098997B2Aug 29, 2006
Surveying system
PENTAX CORP16 citations80
US6600308B2Jul 29, 2003
Magnetic encoder and method for reducing harmonic distortion thereof
PENTAX CORP7 citations74
US6556283B2Apr 29, 2003
Electronic distance meter
PENTAX CORP10 citations74
US6532059B2Mar 11, 2003
Surveying instrument having an optical distance meter
PENTAX CORP10 citations74
US6945657B2Sep 20, 2005
Surveying instrument
PENTAX CORP7 citations73
US6629371B1Oct 7, 2003
Surveying instrument incorporating a magnetic incremental rotary encoder
PENTAX CORP10 citations72
US6555809B2Apr 29, 2003
Incremental rotary encoder
PENTAX CORP10 citations72
US6747733B2Jun 8, 2004
Electronic distance meter
PENTAX CORP6 citations63
US6677568B2Jan 13, 2004
Surveying instrument having a phase-difference detection type focus detecting device
PENTAX CORP3 citations63
US6618126B2Sep 9, 2003
Surveying instrument having a sighting telescope and a phase-difference detection type focus detection device therefor
PENTAX CORP4 citations63
US6501541B2Dec 31, 2002
Electronic distance meter
PENTAX CORP2 citations63
US6501540B2Dec 31, 2002
Surveying instrument having an optical distance meter
PENTAX CORP2 citations61
US6914636B2Jul 5, 2005
Optical viewer instrument with photographing function
PENTAX CORP0 citations42