High security telephone instrument

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Description

FIG. 1 is a perspective view of a high security telephone instrument showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a left side elevational view thereof; and,

FIG. 7 is a bottom plan view thereof.

Referenced Cited
U.S. Patent Documents
D156347 December 1949 Kirshner
D183985 November 1958 Hose
D277480 February 5, 1985 Gackwicz et al.
D290954 July 21, 1987 Read
D299341 January 10, 1989 Yachabach
D302814 August 15, 1989 Rose
D303525 September 19, 1989 Stewart
D305332 January 2, 1990 Schremmer et al.
D315485 March 19, 1991 Schremmer et al.
D318469 July 23, 1991 Joffe et al.
4837814 June 6, 1989 Yoshino et al.
Other references
  • Pose. Off. Telecommun. J. (G.B.); vol. 3, No. 31, Fall 1979, Article & Pictures; New Payphone Take The Credit; by L. L. Grey.
Patent History
Patent number: D330209
Type: Grant
Filed: Mar 22, 1991
Date of Patent: Oct 13, 1992
Assignee: Quadrum Telecommunications, Inc. (Arab, AL)
Inventor: Charles J. Bass (New Hope, AL)
Primary Examiner: Horace B. Fay, Jr.
Attorney: Robert J. Black
Application Number: 7/673,574
Classifications
Current U.S. Class: Coin Or Card Operated (D14/146)