Volume control circuit for use in portable telephone or the like
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 8, 1990
Grant Date -
N/A
app pub date -
Jan 28, 1988
filing date -
Jan 30, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A volume control circuit for a portable telephone set has two volume setting circuits. One of these circuits is activated when the telephone is used within a vehicle and the other is activated when the telephone is removed from the vehicle and carried about as a personal telephone. One embodiment selects between these two circuits by operating mechanical structures which are moved between two positions by physically attaching or removing the telephone to or from the vehicle. Another embodiment uses a microprocessor to make the selection responsive to the operation of a magnetically actuated reed switch.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully