Digital or key card operated electronic door lock

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

FIG. 1 is a top, front, and right side perspective view of a digital or key card operated electronic door lock showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a rear elevational view thereof.

Referenced Cited
U.S. Patent Documents
D290442 June 23, 1987 Floyd et al.
D305861 February 6, 1990 Kautt
D312957 December 18, 1990 Huang
D313159 December 25, 1990 Kautt
3187528 June 1965 Check
4671086 June 9, 1987 Fogleman et al.
4972691 November 27, 1990 Knight
Patent History
Patent number: D351982
Type: Grant
Filed: Aug 6, 1993
Date of Patent: Nov 1, 1994
Inventor: Tsun-Hsing Chen (Taichung)
Primary Examiner: Brian N. Vinson
Application Number: 0/11,494
Classifications
Current U.S. Class: D/8330