Riken Denshi Co., Ltd.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
G01J MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY 177
 
  
 
G01T MEASUREMENT OF NUCLEAR OR X-RADIATION 151
 
  
 
G01V GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS 179

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5386114 Detector for activity direction of magmaDec 17, 93Jan 31, 95[G01J, G01T]
5241175 Method and equipment for prediction of volcanic eruption and earthquakeNov 26, 91Aug 31, 93[G01V]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4994733 Potentiometer for voltage-measuring instrumentExpiredJan 31, 89Feb 19, 91[G01R]
4980570 Device for determining location of aperturesExpiredFeb 23, 90Dec 25, 90[G01N]
4963885 Thermal head printerExpiredFeb 23, 90Oct 16, 90[B41J, G01D]
4636772 Multiple function type D/A converterExpiredMay 22, 85Jan 13, 87[H03K]
4433287 Range switching device for electric meterExpiredMar 10, 81Feb 21, 84[G01R]

Top Inventors for This Owner

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