Dual-tone multi-frequency microphone

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Information

Patent Grant
D376599

References
Source

Patent Number
D376,599
Date Filed
Thursday, May 25, 1995
29 years ago
Date Issued
Tuesday, December 17, 1996
27 years ago

Inventors
- John F. St. Pierre
- Phillip E. Lindeman
Original Assignees
- Motorola, Inc.
Examiners
- Morris; Sandra L.
- Bondade; Nanda
Agents
- Crilly; Daniel C.

US Classifications
- D14 - Recording, communication, or information retrieval equipment
Field of Search
- US
- D14 205-206
- D14 223-229
- D14 299
- 181 158
- 181 242
- 379 368
- 379 430-431
- 381 91
- 381 122
- 381 153
- 381 168
- 381 169
- 381 183
- Term of Grant
  14Years

Information

Abstract

Description

Claims

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

US Referenced Citations (5)

Number	Name	Date	Kind
D244779	Kobayashi	Jun 1977
D249041	Culbertson	Aug 1978
D253767	Peterson	Dec 1979
D281419	Nagele	Nov 1985
D352718	Lindeman	Nov 1994