Digital communication switching exchange

- Northern Telecom Limited
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Description

FIG. 1 is a front perspective view of a digital communication switching exchange showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a side elevational view thereof, the opposite side being a mirror image;

FIG. 6 is a rear elevational view thereof.

The louvers on the front of the design are partially shown in FIGS. 1 and 4 for convenience of illustration, it being understood that the louvers continue across the rectangular panels. The design is shaded to indicate contrast.

Referenced Cited
U.S. Patent Documents
D208633 September 1967 Pascale et al.
D283023 March 18, 1986 Gibson
D284187 June 10, 1986 Brown et al.
Patent History
Patent number: D293791
Type: Grant
Filed: Feb 13, 1985
Date of Patent: Jan 19, 1988
Assignee: Northern Telecom Limited (Montreal)
Inventors: Stanley W. Heldenbrand (San Jose, CA), Michael Brown (Nepean)
Primary Examiner: Susan J. Lucas
Law Firm: Schwartz, Jeffery, Schwaab, Mack, Blumenthal & Evans
Application Number: 6/701,250
Classifications
Current U.S. Class: D14/102; D14/52