Padlock with tamper alarm
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 3, 1985
Grant Date -
N/A
app pub date -
Aug 18, 1983
filing date -
Aug 18, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A padlock contains a battery connected by electrical circuitry and switches to an alarm sounding device which sounds an alarm when someone attempts to force open or sever the lock shackle or when someone attempts to remove the battery in an unauthorized manner. A test signal of momentary duration is automatically sounded each time the lock is opened or closed in an authorized manner, and this indicates whether the alarm system is operative.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
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