Combined microphone and loudspeaker for a communication radio installation

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Description

FIG. 1 is a front view of a combined microphone and loudspeaker for a communication radio installation showing my design;

FIG. 2 is a perspective view showing the front, the top and one side of the combined microphone and loudspeaker for a communication radio installation;

FIG. 3 is a perspective view showing the rear, the bottom and the other side of the combined microphone and loudspeaker for a communication radio installation.

Referenced Cited
U.S. Patent Documents
D238684 February 1976 Walz
D245692 September 6, 1977 Imazeki
D246780 December 27, 1977 Renken
3976840 August 24, 1976 Clevland et al.
Other references
  • Radio Shack Electronics Cat. No. 276, p. 130, C. B. Microphone, top left of page.
Patent History
Patent number: D251783
Type: Grant
Filed: Apr 22, 1977
Date of Patent: May 8, 1979
Assignee: Telefonaktiebolaget L M Ericsson (Stockholm)
Inventor: Jan E. Orn (Stockholm)
Primary Examiner: Bernard Ansher
Law Firm: Hane, Roberts, Spiecens & Cohen
Application Number: 5/789,796
Classifications
Current U.S. Class: D14/12
International Classification: D1401;