Magnetic card-operated electronic door lock

Skip to: Description  ·  References Cited  · Patent History  ·  Patent History
Description

FIG. 1 is a perspective view of a magnetic card operated electronic door lock showing our new design, the broken-line showing of the door knob being for illustrative purposes only and forming no part of the claimed design;

FIG. 2 is a front elevational view thereof, the rear being plane and unornamented;

FIG. 3 is a left side elevational view thereof, the right side being identical in appearance;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof; and

FIG. 6 is a horizontal sectional view thereof, taken along line 6--6 of FIG. 2.

Referenced Cited
U.S. Patent Documents
D271374 November 15, 1983 Butts
D275462 September 11, 1984 Beeson et al.
2772555 December 1956 Smith
3187528 June 1975 Check
3836945 September 1974 Kinoshita et al.
4227388 October 14, 1980 Nigrelli et al.
4232353 November 4, 1980 Musciatti et al.
Patent History
Patent number: D288899
Type: Grant
Filed: Jul 27, 1984
Date of Patent: Mar 24, 1987
Assignee: Sargent Manufacturing Company (New Haven, CT)
Inventors: Alfred E. Floyd (North Guilford, CT), Richard J. Ohno (Branford, CT)
Primary Examiner: Wallace R. Burke
Assistant Examiner: Brian N. Vinson
Law Firm: DeLio & Associates
Application Number: 6/635,358
Classifications
Current U.S. Class: D/8330; D/8353