M.H. CENTER LIMITED

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B21H MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS 17
 
  
 
B21K MAKING FORGED OR PRESSED PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS, WHEELS 122
 
  
 
B23G THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH 18
 
  
 
F01B MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES 126
 
  
 
F02B INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL 171
 
  
 
F04B POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS 161
 
  
 
F16H GEARING199

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5245851 Differential pinion, metal mold for plastic working the same, and method for plastic working with the metal moldOct 08, 92Sep 21, 93[B21K]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2015/0165,535 METHOD OF PROCESSING FEMALE SCREW AND APPARATUS THEREFORAbandonedJul 30, 13Jun 18, 15[B23G]
7331206 Method of fabricating component having internal teeth and rolling machine thereofExpiredJul 21, 04Feb 19, 08[B21H]
4924690 Method and apparatus for plastically forming helical internal gears and helical gearsExpiredDec 20, 88May 15, 90[B21K]
4873150 High water-resistant member, and valve gear using the same for use in internal combustion engineExpiredOct 26, 87Oct 10, 89[F01L]
4653305 Apparatus for forming metallic article by cold extrusionExpiredSep 11, 84Mar 31, 87[B21D]
4300381 Method for producing insert for diesel engine combustion chamberExpiredAug 15, 80Nov 17, 81[B21D]

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