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The ornamental design for an ophthalmic refractor, as shown. |
FIG. 1 is a rear perspective view of the an ophthalmic refractor showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a top view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a left side elevational view thereof; and,
FIG. 7 is a bottom view thereof.
Wood, David E., Burton, Roy H.
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D374720, | Jun 08 1995 | Ophthalmic refractor | |
D550845, | Apr 11 2006 | Kabushiki Kaisha Topcon | Optometer |
Patent | Priority | Assignee | Title |
4606624, | Oct 13 1983 | R. H. Burton Company | Refractor having simplified cylinder lens assembly |
4840479, | Mar 16 1987 | Crossed cylinder lenses refractor with three-lens variable crossed cylinder assembly and method of use | |
4943162, | Nov 09 1984 | Astigmatic self-refractor and method of use |
Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
May 04 1994 | BURTON, ROY H | R H BURTON COMPANY | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 007028 | /0790 | |
May 11 1994 | WOOD, DAVID E | R H BURTON COMPANY | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 007028 | /0790 | |
May 31 1994 | R. H. Burton Company | (assignment on the face of the patent) | / | |||
Dec 26 2008 | THE R H BURTON COMPANY | TOWA MEDICAL INSTRUMENTS CO , LTD | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 022127 | /0476 |
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