Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUSD293791 S
Publication typeGrant
Application numberUS 06/701,250
Publication dateJan 19, 1988
Filing dateFeb 13, 1985
Publication number06701250, 701250, US D293791 S, US D293791S, US-S-D293791, USD293791 S, USD293791S
InventorsStanley W. Heldenbrand, Michael Brown
Original AssigneeNorthern Telecom Limited
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Digital communication switching exchange
US D293791 S
Abstract  available in
Previous page
Next page
  1. The ornamental design for a digital communication switching exchange, substantially as shown and described.

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 by
Citing PatentFiling datePublication dateApplicantTitle
US20080041432 *Jun 13, 2007Feb 21, 2008Willis Phillip MWalking cane assembly
U.S. ClassificationD14/140.3