The National Machinery Company

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B21J FORGING; HAMMERING; PRESSING; RIVETING; FORGE FURNACES 614
 
  
 
B21H MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS 44
 
  
 
B21C MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL120
 
  
 
B21D WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING 155
 
  
 
B64C AEROPLANES; HELICOPTERS 173
 
  
 
F16K VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING172

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9758241 Nose wheel steering valveOct 09, 15Sep 12, 17[F16K, B62D, B64C]
5848547 Cassette toolingMar 20, 98Dec 15, 98[B21J]
5829302 Cassette toolingMay 31, 96Nov 03, 98[B21J]
5732589 Automatically adjustable multiple CAM for forging machineMay 31, 96Mar 31, 98[B21J]
5724847 Integrated wire feed and draw apparatusMay 31, 96Mar 10, 98[B21C]
5713236 Pick and place transferFeb 08, 95Feb 03, 98[B21D]
5704245 Progressive forging machine with individually adjustable toolsMay 31, 96Jan 06, 98[B21J]
5555757 Flat die thread rollerMay 25, 95Sep 17, 96[B21H]
5542275 Flat die thread rollerFeb 21, 95Aug 06, 96[B21H]
5263356 Progressive former and method of producing sameApr 22, 92Nov 23, 93[B21J]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2012/0031,516 Axle Sleeve Manufacturing ProcessAbandonedJun 20, 11Feb 09, 12[F16L, B23B, B23P, B60B, C22F, C21D]
5906544 Washer assembly apparatusExpiredDec 16, 97May 25, 99[B23P]
5746087 Heading slide guiding systemExpiredJun 12, 97May 05, 98[B21J]
5560238 Thread rolling monitorExpiredNov 23, 94Oct 01, 96[B21H]
5363686 Progressive formerExpiredJun 29, 93Nov 15, 94[B21J]
5345800 Flat die thread rollerExpiredMar 22, 93Sep 13, 94[B21H]
5105649 Method of producing forging machinesExpiredJan 14, 91Apr 21, 92[B21J]
5005397 Method for providing progressive formers with quick-change toolingExpiredNov 13, 89Apr 09, 91[B21J]
4942796 Stock feed apparatus for forging machines and the likeExpiredAug 03, 88Jul 24, 90[B26D]
4910993 Progressive former and method of producing sameExpiredMay 04, 88Mar 27, 90[B21J]
4898017 Quick-change tooling for progressive formers and the likeExpiredAug 09, 88Feb 06, 90[B21J]
4838300 Pressure relief cartridgeExpiredMar 25, 88Jun 13, 89[F16K]
4805437 Method and apparatus for producing fasteners having wrenching sockets thereinExpiredDec 21, 87Feb 21, 89[B21K, B21D]
4782580 Method of manufacture of slip ring assemblyExpiredAug 03, 87Nov 08, 88[H01R]
4779444 Closed die forging machineExpiredMar 12, 87Oct 25, 88[B21D]
4705976 Slip ring assembly and method of manufactureExpiredApr 30, 86Nov 10, 87[H01R]
4631950 Progressive former with removable toolingExpiredMay 17, 84Dec 30, 86[B21D]
4615197 Thread rolling monitoring systemExpiredOct 05, 84Oct 07, 86[B21H]
4606730 Bimetal electrodes for spark plugs or the like and method of making sameExpiredSep 21, 83Aug 19, 86[H01T]
4586364 Quick-change transfer headExpiredJul 21, 82May 06, 86[B21J]

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