Digital communication switching exchange

Follow

Information

Patent Grant
D293791

References
Source

Patent Number
D293,791
Date Filed
Wednesday, February 13, 1985
39 years ago
Date Issued
Tuesday, January 19, 1988
37 years ago

Inventors
- Michael Brown
- Stanley W. Heldenbrand
Original Assignees
- Nortel Networks Limited
Examiners
- Lucas; Susan J.
Agents
- Schwartz, Jeffery, Schwaab, Mack, Blumenthal & Evans

US Classifications
- D14 - Recording, communication, or information retrieval equipment
Field of Search
- US
- D14 100
- D14 102
- D14 107
- D14 114
- D14 111
- D14 109
- D14 52
- D14 53
- D14 56
- D14 57
- D14 58
- D14 59
- 361 331
- 361 332
- 361 334
- 361 335
- 361 380
- 361 381
- 361 390
- 379 93
- 379 95
- D13 40
- D13 41
- Term of Grant
  14Years

Information

Abstract

Description

Claims

The ornamental design for a digital communication switching exchange, substantially as shown and described.

US Referenced Citations (3)

Number	Name	Date	Kind
D208633	Pascale et al.	Sep 1967
D283023	Gibson	Mar 1986
D284187	Brown et al.	Jun 1986