Portable telephone auxiliary tone ringer and door alarm

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Description

FIG. 1 is a front perspective view of a portable telephone auxiliary tone ringer and door alarm showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a rear elevational view thereof.

Referenced Cited
U.S. Patent Documents
D260741 September 15, 1981 Lam
D266509 October 12, 1982 Marshall
D291195 August 4, 1987 Shea
D294471 March 1, 1988 Levin et al.
D310219 August 28, 1990 Carlile
D313593 January 8, 1991 Morooka
Patent History
Patent number: D331204
Type: Grant
Filed: Apr 25, 1990
Date of Patent: Nov 24, 1992
Inventor: Jan Hampf (Saro)
Primary Examiner: Wallace R. Burke
Assistant Examiner: Marcus Jackson
Application Number: 7/514,282
Classifications
Current U.S. Class: D10/106; Telephone Equipment (D14/140)