Mini programmable logic controller

- Square D Company
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Description

FIG. 1 is a top, left, front perspective view of a mini-programmable logic controller showing my new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a bottom plan view thereof.

Referenced Cited
U.S. Patent Documents
D292394 October 20, 1987 Boucher
D296432 June 28, 1988 Harris et al.
3942077 March 2, 1976 Powers
4558914 December 17, 1985 Prager et al.
4716497 December 29, 1987 Craker
4738632 April 19, 1988 Schmidt et al.
Foreign Patent Documents
1035318 January 1964 GBX
Other references
  • Square D Company, 1987 brochure, "Programmable and Cell Controller Product Overview".
Patent History
Patent number: D309446
Type: Grant
Filed: Apr 8, 1988
Date of Patent: Jul 24, 1990
Assignee: Square D Company (Palatine, IL)
Inventor: Walter M. Russell (Houston, TX)
Primary Examiner: Susan J. Lucas
Assistant Examiner: Joel Sincavage
Attorney: Michael J. Femal
Application Number: 7/179,008
Classifications
Current U.S. Class: Control Panel, Console Or Module (D13/162)