Telephone amplifier

- John Manufacturing Ltd.
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Description

FIG. 1 is a front elevational view of a telephone amplifier showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a plan view from above thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a left side elevational view thereof.

Referenced Cited
U.S. Patent Documents
D148151 December 1947 Doblin
D150861 July 1948 Hruska et al.
D192637 April 1962 Judson
D220629 May 1971 Shimizu
D227116 June 1973 Sato
D235088 May 1975 Erickson
D254249 February 19, 1980 Biehl
D254565 March 25, 1980 Brown
D259786 July 7, 1981 Leeson et al.
3747880 July 1973 Bock
3991288 November 9, 1976 George et al.
Patent History
Patent number: D287126
Type: Grant
Filed: Jul 10, 1984
Date of Patent: Dec 9, 1986
Assignee: John Manufacturing Ltd. (Hong Kong)
Inventor: John S. Yuen (Kowloon)
Primary Examiner: Wallace R. Burke
Assistant Examiner: Horace B. Fay
Law Firm: Beall Law Offices
Application Number: 6/629,479
Classifications
Current U.S. Class: D14/57; D14/34; D14/60