Eyepiece for gas masks

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Description

FIG. 1 is a rear perspective view of an eyepiece for gas masks showing my new design;

FIG. 2 is a front perspective view thereof;

FIG. 3 is a side view thereof.

Referenced Cited
U.S. Patent Documents
D184011 December 1958 Hirshman et al.
988005 March 1911 Malcom
1099147 June 1914 Hansen
1417326 May 1922 Jacobsson
1754419 April 1930 Drager
2005072 June 1935 Booharin
2026435 December 1935 Ratti
2238492 April 1941 Leguillon
4021103 May 3, 1977 Gaspari
Foreign Patent Documents
78936 October 1919 DE2
712407 October 1941 DE2
859871 September 1940 FRX
195783 May 1938 CHX
567531 February 1945 GBX
Patent History
Patent number: D278087
Type: Grant
Filed: Jun 4, 1982
Date of Patent: Mar 19, 1985
Assignee: Aoco Limited/Limitee (Toronto)
Inventor: Erwin Pruefer (Foxboro)
Primary Examiner: Susan J. Lucas
Law Firm: Browdy and Neimark
Application Number: 6/385,295
Classifications
Current U.S. Class: D29/9; D/2234; Lens (D16/101)