Pilkington PE Limited

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
G02B OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS 1204
 
  
 
G03H HOLOGRAPHIC PROCESSES OR APPARATUS 131
 
  
 
G05G CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY 131

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5694814 Clamps providing a geometrical lockFeb 06, 95Dec 09, 97[G05G]
5396349 Lateral and longitudinal chromatic dispersion correction in display systems employing non-conformal reflection hologramsJul 23, 92Mar 07, 95[G02B, G03H]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6445506 Head up display systemExpiredJan 17, 01Sep 03, 02[G02B]
6424460 Dual field-of-view objects system for the infraredExpiredNov 30, 00Jul 23, 02[G02B]
6236501 Three element objective lens system using Germanium lens elementExpiredMay 03, 99May 22, 01[G02B]
5793911 Illumination deviceExpiredJul 06, 95Aug 11, 98[G02B]
5479273 Hologram constructionExpiredApr 30, 93Dec 26, 95[G03H]
5249081 Optical apparatus for superimposing displayed visual informationExpiredSep 23, 91Sep 28, 93[G02B]
5208123 Hologram constructionExpiredMay 17, 90May 04, 93[G03H]
5189532 Edge-illuminated narrow bandwidth holographic filterExpiredOct 15, 91Feb 23, 93[G02B, G03H]
5126554 Imaging device using multiple area sensorsExpiredJul 06, 90Jun 30, 92[H01J, G02B]
5120621 Holographic exposure method and apparatusExpiredFeb 21, 90Jun 09, 92[G03H]
5100218 Thermal imaging optical systemExpiredMay 10, 89Mar 31, 92[G02B]
4934771 Optical apparatusExpiredMay 09, 86Jun 19, 90[G02B]
4850660 High emissivity article having multiple layers of a material of high internal stressExpiredJul 29, 87Jul 25, 89[G02B]
4834472 Optical beam expanders with materials chosen to effect athermalizationExpiredMar 17, 87May 30, 89[G02B]
4832448 Interference filterExpiredSep 29, 87May 23, 89[G02B]
4801183 Infra-red optical systemsExpiredJul 30, 85Jan 31, 89[G02B]
4791853 Weapon aiming system for use in a tankExpiredDec 07, 87Dec 20, 88[F41G]
4772942 Display system having wide field of viewExpiredJan 07, 87Sep 20, 88[H04N]
4714307 Catadioptric infrared lensesExpiredJul 10, 86Dec 22, 87[G02B]
4714309 Reflection hologramsExpiredJun 05, 85Dec 22, 87[G02B, G03H]

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