SIGMA CORPORATION

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
F16L PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL268
 
  
 
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
7266875 Joint restraint assemblyJul 18, 06Sep 11, 07[B23P]
7185924 Joint restraint assemblyAug 08, 03Mar 06, 07[F16L]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2009/0294,890 MULTI-COLOUR SENSITIVE DEVICE FOR COLOR IMAGE SENSINGAbandonedDec 05, 05Dec 03, 09[H01L]
5060986 Sleeve adapterExpiredMar 30, 90Oct 29, 91[F16L]
4976457 Sleeve adapterExpiredDec 07, 88Dec 11, 90[F16L]
4745422 Automatic developing apparatusExpiredNov 17, 86May 17, 88[G03D]
4724453 Camera information transmission systemExpiredNov 24, 86Feb 09, 88[G03B]
4712900 Apparatus for converting interchangeable camera lens from manual into autofocusExpiredDec 12, 86Dec 15, 87[G03B]
4647171 Fully automatic diaphragm control interchangeable lensExpiredMay 16, 85Mar 03, 87[G03B]
4624536 Four component zoom lensExpiredFeb 02, 83Nov 25, 86[G02B]
4621037 Method for detecting endpoint of developmentExpiredJul 08, 85Nov 04, 86[G03C, B60S]
4338157 Method for forming electrical connecting lines by monitoring the etch rate during wet etchingExpiredSep 09, 80Jul 06, 82[H01L]
4288281 Appliance for adhering a sensing marker on a medium for recording informationExpiredSep 12, 79Sep 08, 81[B44C]

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