Inventor
OHISHI MASAHIRO
JP42 patents
⚠️ This page may combine multiple inventors who share the name “OHISHI MASAHIRO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
TOPCON CORP
36 patentsUS6396571B2May 28, 2002
Portable type distance measuring apparatus
TOPCON CORP80 citations98
US5054911AOct 8, 1991
Light wave distance measuring instrument of the pulse type
TOPCON CORP84 citations96
US5075878ADec 24, 1991
High resolution measuring device for time difference
TOPCON CORP33 citations93
US4942561AJul 17, 1990
Delay time measuring device
TOPCON CORP36 citations93
US6665055B2Dec 16, 2003
Light-wave rangefinder using a pulse method
TOPCON CORP27 citations92
US6433860B1Aug 13, 2002
Light wave rangefinder
TOPCON CORP31 citations92
US6248989B1Jun 19, 2001
Tilt detecting device
TOPCON CORP36 citations92
US6048105AApr 11, 2000
Laser system for surveying
TOPCON CORP22 citations92
US5991325ANov 23, 1999
Laser beam emitting apparatus and method of driving laser light source
TOPCON CORP19 citations92
US5936987AAug 10, 1999
Laser beam emitting apparatus
TOPCON CORP32 citations92
US5745623AApr 28, 1998
Laser system for surveying
TOPCON CORP28 citations92
US5532813AJul 2, 1996
Optical distance meter and light source device used for the same
TOPCON CORP25 citations90
US6683693B1Jan 27, 2004
Target device
TOPCON CORP62 citations89
US6473166B1Oct 29, 2002
Automatic surveying equipment and three-dimensions measuring method
TOPCON CORP34 citations87
US6473716B1Oct 29, 2002
Three-dimensions measuring method and surveying equipment using the same
TOPCON CORP18 citations81
US7382443B2Jun 3, 2008
Distance measuring method and distance measuring device
TOPCON CORP13 citations80
US6356344B1Mar 12, 2002
Mixing apparatus and optical rangefinder using the same
TOPCON CORP13 citations74
US6333783B1Dec 25, 2001
Distance measuring system
TOPCON CORP9 citations74
US6002696ADec 14, 1999
Laser apparatus and method of controlling the same
TOPCON CORP10 citations74
US5909455AJun 1, 1999
Rotating laser beam irradiating apparatus
TOPCON CORP7 citations74
US5825798AOct 20, 1998
Laser oscillating apparatus and method of driving laser beam source
TOPCON CORP16 citations74
US6384904B1May 7, 2002
Distance measuring apparatus
TOPCON CORP8 citations73
US6483121B1Nov 19, 2002
Distance measuring apparatus and distance measuring method
TOPCON CORP7 citations72
US6803593B2Oct 12, 2004
Distance measuring system
TOPCON CORP9 citations71
US7777865B2Aug 17, 2010
Time difference measuring device, measuring method, distance measuring device, and distance measuring method
TOPCON CORP2 citations63
US6084896AJul 4, 2000
Laser light-source apparatus and method of producing light beam
TOPCON CORP3 citations63
US7945821B2May 17, 2011
Time lag measuring device, distance measuring apparatus and distance measuring method
TOPCON CORP3 citations62
US7626686B2Dec 1, 2009
Surveying instrument
TOPCON CORP4 citations62
US5898489AApr 27, 1999
Laser irradiation light detecting device
TOPCON CORP6 citations62
US6710885B2Mar 23, 2004
Measuring system
TOPCON CORP6 citations61
US6687038B2Feb 3, 2004
Optical pulse observing device
TOPCON CORP0 citations52
US12571631B2Mar 10, 2026
Surveying instrument
TOPCON CORP0 citations47
US6693703B2Feb 17, 2004
Distance measuring device and method for adjusting photodetection unit of distance measuring device
TOPCON CORP0 citations42
US7903235B2Mar 8, 2011
Surveying instrument and surveying method
TOPCON CORP0 citations41
US10732267B2Aug 4, 2020
Electro-optical distance meter
TOPCON CORP0 citations40
US10663296B2May 26, 2020
Surveying instrument
TOPCON CORP0 citations40