Clean room entry-exit system

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

FIG. 1 is a perspective view of a clean room entry-exit system showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation view thereof; and

FIG. 7 is a rear elevation view thereof.

Referenced Cited
U.S. Patent Documents
3777736 December 1973 Van Der Waarj et al.
3841324 October 1974 Kruiswijk
4016809 April 12, 1977 Austin
4548627 October 22, 1985 Landy
Foreign Patent Documents
1122296 January 1962 DEX
Patent History
Patent number: D290290
Type: Grant
Filed: Sep 21, 1984
Date of Patent: Jun 9, 1987
Inventor: Robert E. Jones, Jr. (Colorado Springs, CO)
Primary Examiner: James M. Gandy
Assistant Examiner: Kay H. Chin
Attorney: Max L. Wymore
Application Number: 6/652,917
Classifications
Current U.S. Class: D23/140; Belt Or Roller Conveyor (D34/29)