US Patent No: 4,882,579

Number of patents in Portfolio can not be more than 2000

Code division multiplexed acknowledge back paging system

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Abstract

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An acknowledge back (ack-back) paging system is provided which includes a central station which transmits a group of message signals to an group of ack-back pagers which are addressed as a group. The users of the group of addressed ack-back pagers indicate a response to their respective pagers thus providing ack-back data. The pagers in the group of addressed ack-back pagers then simultaneously transmit back to the central station their ack-back signals using different respective pseudorandom codes, a different pseudorandom code being dynamically allocated to each of the pagers in the group.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
MOTOROLA, INC.SCHAUMBURG, IL7095

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Siwiak, Kazimierz Coral Springs, FL 52 1891

Cited Art Landscape

Patent Info (Count) # Cites Year
 
MOTOROLA, INC. (5)
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Nippon Electric Co., Ltd. (3)
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NEC CORPORATION (2)
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Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
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ASPECT COMMUNICATIONS CORPORATION (13)
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MOTOROLA MOBILITY LLC (10)
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5,671,247 Method and apparatus for interference suppression in spread spectrum signals 37 1995
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JOAO CONTROL &MONITORING SYSTEMS, LLC (7)
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PROTOCOL-IP.COM, L.L.C. (7)
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MOTOROLA, INC. (5)
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NEXUS 1994 LIMITED (5)
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QUALCOMM INCORPORATED (5)
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Other [Check patent profile for assignment information] (3)
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5,513,244 Remote-controlled anti-theft, theft reporting, or vehicle recovery system and method for motor vehicles 102 1995
6,205,323 Jury paging system 6 1998