1980 - Volume #4, Issue #3, Page #25
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Driveway Alarm Announces Friend,Foe
You don't have to monkey with a cable or other "drive-over" device to install Lane Sentry, a new driveway alarm from S.A. Clark and Associates, Marion, Iowa.
The Lane Sentry system utilizes a probe (12 in. long and 1 in. in dia.) which is buried at the side of the driveway. When any moving metal object passes wit..........


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1980 - Volume #4, Issue #3