Indirect ophthalmoscopy lens straight retaining ring

- Volk Optical, Inc.
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Description

FIG. 1 is a side elevational view of an indirect ophthalmoscopy lens straight retaining ring, showing the new design accordingly.

FIG. 2 is a cross-sectional view taken along line 2--2 of FIG. 1 where the indirect ophthalmoscopy lens is clearly shown;

FIG. 3 is an end elevational view taken from the right of FIG. 1; and,

FIG. 4 is an end elevational view taken from the left of FIG. 1.

Referenced Cited
U.S. Patent Documents
D357319 April 11, 1995 Volk
4913545 April 3, 1990 Volk
5255025 October 19, 1993 Volk
5784147 July 21, 1998 Volk
Patent History
Patent number: D434851
Type: Grant
Filed: Feb 9, 1999
Date of Patent: Dec 5, 2000
Assignee: Volk Optical, Inc. (Mentor, OH)
Inventors: Richard M. Mueller (Mentor, OH), Donald A. Volk (Mentor, OH)
Primary Examiner: Stella Reid
Attorney: Venable
Application Number: 0/100,338
Classifications
Current U.S. Class: Ophthalmic (44) (D24/172)
International Classification: 2401;