Kubota Iron Works Co., Ltd.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B21K MAKING FORGED OR PRESSED PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS, WHEELS 221
 
  
 
B21J FORGING; HAMMERING; PRESSING; RIVETING; FORGE FURNACES 119
 
  
 
B23P OTHER WORKING OF METAL; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS 155

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
7360388 Hollow stepped shaft and method of forming the sameNov 29, 06Apr 22, 08[B21J]
6651330 Torque converterJul 12, 02Nov 25, 03[B21K]
6594895 Torque converterOct 09, 01Jul 22, 03[B23P]
5237745 Method of and apparatus for manufacturing drive plateDec 24, 91Aug 24, 93[B21K]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2008/0127,704 HOLLOW STEPPED SHAFT AND METHOD OF FORMING THE SAMEAbandonedJan 31, 08Jun 05, 08[B21J, B21D]
2008/0060,406 Method of and apparatus for forming a hollow step profiled shaftAbandonedSep 12, 07Mar 13, 08[B21K, B21D, F16H]
7171837 Hollow stepped shaft and method of forming the sameExpiredMar 17, 04Feb 06, 07[B21D]
7172059 Electromagnetic couplingExpiredApr 08, 04Feb 06, 07[F16D]
7134312 Die apparatus and die exchanging method in pressing machineExpiredNov 13, 03Nov 14, 06[B21D]
7100417 Lower die assembly in pressing machineExpiredNov 13, 03Sep 05, 06[B21J]
7015434 Method of joining together magnetic and nonmagnetic materialsExpiredApr 01, 04Mar 21, 06[B23K]
6959479 Method of manufacturing a hollow shaft having a flange at one end thereofExpiredJun 20, 03Nov 01, 05[B21K]
6941783 Double action oil hydraulic pressExpiredNov 06, 03Sep 13, 05[B21C, B30B]
6662446 Method for manufacturing a torque converterExpiredJul 12, 02Dec 16, 03[B21K]
6615476 Method of manufacturing a hollow shaft having a flange at one end thereofExpiredJun 26, 00Sep 09, 03[B21D]
6474062 Torque converterExpiredOct 28, 99Nov 05, 02[B23P, B21K, F16D]
6126388 Water pump and manufacturing method thereofExpiredJul 27, 98Oct 03, 00[F01D]
5722138 Apparatus for manufacturing toothed gearsExpiredJul 16, 96Mar 03, 98[B23P]
5699689 Method of and apparatus for forming a disc-shaped blankExpiredJun 18, 96Dec 23, 97[B21H]
5562785 Method for manufacturing toothed gearsExpiredApr 18, 95Oct 08, 96[C21D]
5310432 Toothed wheel for use in automobiles and its manufacturing methodExpiredJun 29, 93May 10, 94[C22C]

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