Dual-tone multi-frequency microphone

- Motorola, Inc.
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Description

FIG. 1 is a top, front left isometric view of one embodiment of a dual-tone multi-frequency microphone showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a rear elevational view thereof.

The broken lines shown in FIGS. 1-4 and 6-7 are included for the purpose of illustrating environmental elements only and form no part of the claimed design.

Claims

The ornamental design for a dual-tone multi-frequency microphone, as shown and described.

Referenced Cited
U.S. Patent Documents
D253767 December 25, 1979 Peterson
D281419 November 19, 1985 Nagele
D303116 August 29, 1989 Richards et al.
D376599 December 17, 1996 Lindeman et al.
D378820 April 15, 1997 Tokiyama et al.
D388094 December 23, 1997 Tokiyama
2587684 March 1952 Bauer
Patent History
Patent number: D440560
Type: Grant
Filed: Jul 18, 2000
Date of Patent: Apr 17, 2001
Assignee: Motorola, Inc. (Schaumburg, IL)
Inventors: Masaru Tokiyama (Coral Springs, FL), Marc H. Pullman (Bartlett, IL)
Primary Examiner: Nanda Bondade
Attorney, Agent or Law Firm: Frank M. Scutch, III
Application Number: 29/126,645
Classifications
Current U.S. Class: Microphone (D14/225)
International Classification: 1401;