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Telefonaktiebolaget L M Patents
Assignee:
Telefonaktiebolaget L M
Address:
publ) (Stockholm, SE
No. of patents:
5
Patents:












Patent Number Title Of Patent Date Issued
7642979 Wave-guide-notch antenna January 5, 2010
A dual polarized wave-guide notch antenna array is disclosed. The device comprises a feed section having at least two input transmission lines, a feed/wave-guide interface providing an aperture for transferring a radio frequency electromagnetic wave between the feed section and a wave-gu
6708041 Base station transmit power control in a CDMA cellular telephone system March 16, 2004
A power control method in accordance with the present invention synchronizes the transmit power levels at the base stations currently serving a mobile station and an initial transmit power level of a new target base station being added in a diversity handover situation. At the beginn
6151482 Operation and maintenance link for antenna equipment November 21, 2000
An operation and maintenance communications link is established between an antenna near parts component and transmitter and receiver of a transceiver site assembly. The transmitter and receiver are connected to a remote antenna by means of a radio frequency feeder supporting a plurality
5950123 Cellular telephone network support of audible information delivery to visually impaired subscrib September 7, 1999
Cellular telephone network textual messages are conventionally delivered to mobile stations for subscriber presentation on an included display. To accommodate a visually impaired subscriber, however, these textual messages are instead converted to an audible format and delivered to be
5937032 Testing method and apparatus for verifying correct connection of curcuit elements August 10, 1999
A method and apparatus for testing for correct connection together of circuit elements in a circuit formed of a plurality of redundant circuit portions. A coded signal is generated at a first circuit element and transmitted upon a signal path believed to connect the first circuit ele

 
 
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