Dual filter respirator
Description
FIG. 1 is a front elevational view of the dual filter respirator embodying our new design;
FIG. 2 is a rear perspective view thereof;
FIG. 3 is a side view thereof, the opposite side being of substantially the same appearance;
FIG. 4 is a top plan view thereof; and
FIG. 5 is a bottom plan view thereof.
Referenced Cited
U.S. Patent Documents
Foreign Patent Documents
Other references
D271246 | November 1, 1983 | Matheson et al. |
2664887 | January 1954 | Green |
4373520 | February 15, 1983 | Arbiqne |
460003 | May 1928 | DE2 |
- New Equipment Digest (vol. 48, No. 2, Feb. 1983) Scientific Library Call No. TA/401/.N45 (p. 88: Lightweight Respirator).
Patent History
Patent number: D286213
Type: Grant
Filed: May 11, 1983
Date of Patent: Oct 14, 1986
Inventors: Richard D. Maryyanek (Northbridge, MA), Joseph Z. Zdrok (Webster, MA)
Primary Examiner: Wallace R. Burke
Assistant Examiner: Brian N. Vinson
Law Firm: Pahl, Lorusso & Loud
Application Number: 6/493,649
Type: Grant
Filed: May 11, 1983
Date of Patent: Oct 14, 1986
Inventors: Richard D. Maryyanek (Northbridge, MA), Joseph Z. Zdrok (Webster, MA)
Primary Examiner: Wallace R. Burke
Assistant Examiner: Brian N. Vinson
Law Firm: Pahl, Lorusso & Loud
Application Number: 6/493,649
Classifications
Current U.S. Class:
D29/7