Dental shade guide

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Description

FIG. 1 is a bottom, front and left side perspective view of a dental shade guide showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof, the left side being a mirror image;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

Referenced Cited
U.S. Patent Documents
1518608 December 1924 Shoa
2249634 July 1941 Myerson
2262641 November 1941 Hayward
2765534 October 1956 Bloom et al.
2805478 September 1957 Adams
3521357 July 1970 Berglund et al.
4115922 September 26, 1978 Alderman
4618325 October 21, 1986 Appelle
4810193 March 7, 1989 Wieder
Other references
  • "Lumin Shade Guide" Vident Publication. "Suggestions For Shade Selection With Your New Trubyte Bioform Extended Range Shade Guide", Dentsply International Inc. (1973, 1983).
Patent History
Patent number: D328348
Type: Grant
Filed: Aug 10, 1990
Date of Patent: Jul 28, 1992
Assignee: Minnesota Mining and Manufacturing Company (St. Paul, MN)
Inventors: Daryl L. Neisse (Lake Elmo, MN), Ross A. Longhini (Woodbury, MN), Gerald E. Drake (Oakdale, MN), James R. Kvitrud (White Bear Lake, MN)
Primary Examiner: Susan J. Lucas
Assistant Examiner: M. H. Tung
Attorneys: Gary L. Griswold, Walter N. Kirn, James D. Christoff
Application Number: 7/565,615
Classifications
Current U.S. Class: Dental (46) (D24/176)