NATIONAL INSTITUTE OF METROLOGY P.R. CHINA

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
H01S DEVICES USING STIMULATED EMISSION488
 
  
 
G01M TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR265
 
  
 
B06B GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL 123
 
  
 
G01R MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES 1158
 
  
 
H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, GENERATORS, OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS 186

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9539616 Infrasound generating device based on a displacement-feedback type vibration exciterAug 16, 12Jan 10, 17[G01H, B06B]
9097603 Vibration exciter system with a feedback control unit based on an optical linear encoderMay 03, 12Aug 04, 15[G01M, H02P]
9099943 Electromagnetic vibration exciter system with adjustable electro-viscoelastic suspension deviceMay 03, 12Aug 04, 15[G01M, H02P]
9036668 Grating external-cavity semiconductor laser and quasi-synchronous tuning method thereofJun 10, 09May 19, 15[H01S]
8953649 Grating external-cavity semiconductor laser and quasi-synchronous method thereofJan 15, 14Feb 10, 15[H01S]
8823359 Three-phase electric energy measurement apparatusDec 11, 09Sep 02, 14[G01R]
8284813 F-P cavity and laser using said F-P cavityJul 07, 11Oct 09, 12[H01S]
8107509 Monolithic folded F-P cavity and semiconductor laser using the sameJan 22, 09Jan 31, 12[H01S]

Expired/Abandoned/Withdrawn Patents

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