H.P.M. Industries Pty Limited

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6563273 Two-wire controlled switchingExpiredDec 04, 00May 13, 03[H05B]
5990628 Light level sensor for detecting the level of incident light and discriminating between natural and artificial lightExpiredOct 10, 96Nov 23, 99[H05B]
5982052 DC power control of switching devicesExpiredMay 11, 98Nov 09, 99[H01H]
5825019 Timing device capable of synchronizing initiation timeExpiredOct 10, 96Oct 20, 98[H01J]
5808851 Controlled switchingExpiredOct 10, 96Sep 15, 98[H01H]
5528484 Power supplyExpiredSep 13, 94Jun 18, 96[H02M]
5455488 Miniature light-activated lamp control apparatus and the likeExpiredJan 28, 94Oct 03, 95[H05B, G02B]
5352985 Apparatus for determining the relative positions of power outlets within an electrical circuitExpiredNov 27, 92Oct 04, 94[G01R]
D313223 Illuminated electrical switchExpiredNov 25, 87Dec 25, 90[]

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