Optical filter prism

- Luminati Ltd., Inc.
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Description

FIG. 1 is a front perspective view of an optical filter prism showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a side elevational view thereof;

FIG. 5 is an opposite side elevational view thereof;

FIG. 6 is a rear elevational view thereof; and,

FIG. 7 is a bottom plan view thereof.

Referenced Cited
U.S. Patent Documents
D232652 September 1974 Hoffer
D313250 December 25, 1990 Pacitti
1855987 April 1932 Rammer
1970209 August 1934 Weaton
2442564 June 1948 Heyer
3121525 February 1964 Hayes
3590499 July 1971 Rinehuls
4170401 October 9, 1979 Yoder, Jr. et al.
4537001 August 27, 1985 Uppstrom
4623225 November 18, 1986 Forkner
Foreign Patent Documents
336 1871 GBX
Other references
  • "Crystallography" by Wadsworth 1909 Plate VII FIG. No. 153, center top middle.
Patent History
Patent number: D344968
Type: Grant
Filed: Sep 26, 1990
Date of Patent: Mar 8, 1994
Assignee: Luminati Ltd., Inc. (Winchester, MA)
Inventor: David Dowd (Somerville, MA)
Primary Examiner: Bernard Ansher
Assistant Examiner: Paula Mortimer
Law Firm: Cesari and McKenna
Application Number: 7/588,959
Classifications
Current U.S. Class: Prism (D16/137)