VISION SYSTEMS LIMITED

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
G08B SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS 193

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
RE34704 Improved pollution detection apparatusJun 02, 89Aug 23, 94[G08B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5665924 Gas sampling point for smoke/pollution detection systemExpiredJun 13, 96Sep 09, 97[G01N]
5440145 Sampling chamber for a pollution detectorExpiredMar 25, 94Aug 08, 95[G01N]
5372477 Gaseous fluid aspirator or pump especially for smoke detection systemsExpiredDec 09, 92Dec 13, 94[F04D]
4781065 Solid-state anemometers and temperature gaugesExpiredApr 17, 87Nov 01, 88[G01F]
4714347 Optical smoke detectorsExpiredAug 13, 84Dec 22, 87[F21V, G01N]
4665311 Smoke detecting apparatusExpiredAug 13, 84May 12, 87[H01J, G01N]
4607915 Light absorbersExpiredAug 13, 84Aug 26, 86[G02B]
4361888 Technique for increasing the efficiency of low pressure, short pulse laser systemsExpiredJun 24, 80Nov 30, 82[H01S]
4225858 Doppler intrusion detector with dual phase processingExpiredNov 10, 77Sep 30, 80[G08B]
4215341 Intrusion or movement detectorExpiredJan 18, 78Jul 29, 80[G08B]
4195289 Microwave intrusion or movement detectorsExpiredJan 31, 78Mar 25, 80[G08B, H01Q, G01S]

Top Inventors for This Owner

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