Pioneer Communication Corp.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2009/0239,465 DOORPHONE SYSTEMAbandonedSep 17, 08Sep 24, 09[H04B]
5963639 Telephone having an audio response functionExpiredAug 21, 97Oct 05, 99[H04M]
5293419 Simultaneous voice-call system for cordless telephoneExpiredApr 29, 92Mar 08, 94[H04M, H04Q]
5259020 Portable-to-portable call transfer system for cordless telephoneExpiredApr 29, 92Nov 02, 93[H04M, H04B]
5247567 Portable-to-portable talk system for cordless telephoneExpiredApr 29, 92Sep 21, 93[H04M]

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