Patent EP0622935A1 successfully refreshed from Google Patents.
EP0622935A1
Expired / Lapsed
EP
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Portable telephone apparatus having option circuits in a battery pack
Assignee: NEC Corp
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Filing: 1994-04-26
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Granted: —
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Expires: 2014-04-26
Abstract
Abstract In a portable telephone apparatus selectively operable in a portable or in an on-board mode, an option circuit (48) is built in a chargeable battery pack (34) for adding an extra function to a telephone (32). A plurality of keys are arranged on the telephone and operable to cause the telephone and option circuit to interchange speech signals and control signals and to start and stop operating.
Inventors
- 👤 Motoyoshi Komoda
- 👤 Minoru Katsumata
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 10:27
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/02; H04M1/0202; H04M1/026; H04M1/0262; H04B; H04B1/00; H04B1/38; H04B1/3827; H04B1/3877; H04B1/3883; H04M1/72; H04M1/724; H04M1/72403; H04M1/72409
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
65 words
A portable telephone apparatus comprising: a portable telephone (32) having at least a plurality of keys, a display and a transmitter/receiver (40); a chargeable battery pack (34) removably mounted on said portable telephone and selectively electrically connected to or disconnected from said portable telephone; and characterised by an option circuit (48) accommodated in said battery pack for adding an extra function to said portable telephone.
Claim 2
Dependent Claim
26 words
An apparatus as claimed in Claim 1, wherein said portable telephone (32) and said option circuit (48) interchange speech signals and control signals with each other.
Claim 3
Dependent Claim
39 words
An apparatus as claimed in Claim 1, wherein said plurality of keys are operable to cause said portable telephone (32) and said option circuit (48) to interchange speech signals and control signals and to selectively start or stop operating.
References Cited (Backward Citations)
EP0423733A2
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DE9001293U1
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JPH04233853A
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GB2251515A
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JPH04286444A
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EP0521609A2
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US5136229A
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JPH05292165A
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