Ultracision Inc.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5986539 Hafe-duplex two-wire DC power-line communication systemExpiredJun 08, 98Nov 16, 99[H04M]
4794238 Method and apparatus for reading and marking a small bar code on a surface of an itemExpiredOct 09, 87Dec 27, 88[G06K]
4788527 Apparatus and method for device control using a two conductor power lineExpiredSep 17, 84Nov 29, 88[G08B, H04Q]

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