Telephone loop tester

Skip to: Description  ·  References Cited  · Patent History  ·  Patent History
Description

FIG. 1 is a bottom, front and left side perspective view of a telephone loop tester showing our new design;

FIG. 2 is a front elevational view;

FIG. 3 is a rear elevational view;

FIG. 4 is a top plan view;

FIG. 5 is a bottom plan view;

FIG. 6 is a right side elevational view; and

FIG. 7 is a left side elevational view thereof.

Referenced Cited
U.S. Patent Documents
D234603 March 1975 Snow et al.
D242722 December 14, 1976 Bell
D249658 September 26, 1978 Fields
D254778 April 22, 1980 Kitada et al.
D292493 October 27, 1987 King
2449057 September 1948 Clayden
3792205 February 1974 O'Dea
4022987 May 10, 1977 O'Dea
4292480 September 29, 1981 Sweatt
4513179 April 23, 1985 Phillips et al.
4536703 August 20, 1985 Jablway et al.
4591671 May 27, 1986 Pinede et al.
Patent History
Patent number: D318431
Type: Grant
Filed: Apr 10, 1989
Date of Patent: Jul 23, 1991
Assignee: Independent Technologies, Inc. (Omaha, NE)
Inventors: Dennis C. Blood (North St. Paul, MN), David L. Ingalsbe (Hastings, MN)
Primary Examiner: Nelson C. Holtje
Assistant Examiner: Antoine D. Davis
Attorneys: Anthony G. Eggink, Joel D. Skinner
Application Number: 7/335,984
Classifications
Current U.S. Class: Provided With Handle, Or Hand-held (D10/78)