Telephonic communications – Having light wave or ultrasonic link for speech or paging... – Including fiber optic link within telephone network
Patent
1991-03-06
1993-12-14
Ng, Jin F.
Telephonic communications
Having light wave or ultrasonic link for speech or paging...
Including fiber optic link within telephone network
379428, 379429, 379433, 455348, H04M 1100, H04M 100, H04B 108
Patent
active
052710564
ABSTRACT:
A frame construction for a radio telephone or the operating device of a radio telephone. The radio telephone comprises a frame on which printed circuit boards containing telephone electronics are secured on both sides of a substantially flat, electrically conductive frame plate. The frame plate together with ground foils of the printed circuit boards form EMI-shielding for the components located on the sides of the printed circuit boards which face the frame plate. The frame plate preferably has a raised edge to which a printed circuit board is secured. Radio telephone housing parts are located on the two sides of the frame plate to form the radio telephone housing.
REFERENCES:
patent: 4375584 (1983-03-01), Muzumdar et al.
patent: 5081674 (1992-01-01), Wijas et al.
patent: 5107404 (1992-04-01), Tam
patent: 5130629 (1992-07-01), Kuhfus
patent: 5157723 (1992-10-01), McLean
Motorola, "DYNA TAC Cellular Mobile Telephone" Aug. 31, 1983 Mechanical Parts.
Leman Ari
Pesola Mikko
Saarnimo Timo
Valimaa Veli-Matti
Cumming William D.
Ng Jin F.
Nokia Mobile Phones Ltd.
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