Headset-hardhat adapter

- Northern Telecom Limited
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Description

FIG. 1 is a front view of a headset-hardhat adapter, showing my new design;

FIG. 2 is a perspective view thereof;

FIG. 3 is a side view thereof;

FIG. 4 is an end view thereof; and

FIG. 5 is a rear view.

Referenced Cited
U.S. Patent Documents
D239034 March 1976 Stilgenbauer
3134861 May 1964 Dempsey et al.
3629522 April 1969 Richards
3787641 January 1974 Santori
3889190 June 1975 Palmer
3890475 June 1975 Denhart
3902025 August 1975 Lewis
Patent History
Patent number: D248158
Type: Grant
Filed: Aug 16, 1976
Date of Patent: Jun 13, 1978
Assignee: Northern Telecom Limited (Montreal)
Inventor: Clifford D. Read (Ottawa)
Primary Examiner: Bernard Ansher
Attorney: John E. Mowle
Application Number: 5/714,621
Classifications
Current U.S. Class: D14/94
International Classification: D1403;