Letter bomb detector

Dec 21, 1977

Description

FIG. 1 is a top and right front perspective view of a letter bomb detector showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side elevational view thereof.

Referenced Cited

U.S. Patent Documents

D193480	August 1962	Hartjen
D203623	February 1966	Milani
D232657	September 1974	Kulik
3893022	July 1975	Kulik

Patent History

Patent number: D255783
Type: Grant
Filed: Dec 21, 1977
Date of Patent: Jul 8, 1980
Inventor: Ronald B. Hays (Gaithersburg, MD)
Primary Examiner: Nelson C. Holtje
Attorney: Allan M. Lowe
Application Number: 5/862,985

Classifications

Current U.S. Class: Measuring, Regulating Or Indicating Instrument, Or Casing (D10/46); D10/104
International Classification: D1004; D1005;