Tamper-deterrent device

Details Tamper-deterrent device Tamper-deterrent device

1990-08-29

1991-10-01

Schreyer, Stafford D.

Telephonic communications

With check operated control

Fraud or interference prevention

232 575, 194202, B65G 1104, H04M 1702

Patent

active

050540564

ABSTRACT:
The present invention is directed toward deterring modification of a telephone unit by drilling by inserting a drill guard in the drilling path or axis such that the drill guard defines a surface portion in the drill path or axis at a deflection angle sufficient to prevent drilling due to deflection of the drill.

REFERENCES:
patent: 4248336 (1981-02-01), Fiedler
patent: 4966325 (1990-10-01), Anello

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