Patent
   D316144
Priority
Feb 12 1988
Filed
Aug 09 1988
Issued
Apr 09 1991
Expiry
Apr 09 2005
Assg.orig
Entity
unknown
10
4
n/a
The ornamental design for a refractometer, as shown and described.

FIG. 1 is a front elevational view of a refractometer showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a perspective view thereof in use position.

Nishimura, Hiroshi

Patent Priority Assignee Title
D327024, Dec 29 1989 Essilor International (Compagnie Generale d'Optique) Refractometer
D330769, Oct 25 1989 Carl-Zeiss-Stiftung, Heidenheim-Brenz Confocal laser-scanning ophthalmoscope
D341541, Oct 23 1991 Canon Kabushiki Kaisha Automatic eye-refraction measuring apparatus with spectacle lens measuring apparatus
D394505, Jul 09 1996 Canon Kabushiki Kaisha Non-contact eye-pressure measuring apparatus
D457962, Nov 08 2001 REICHERT, INC Automatic refractometer
D465850, May 08 2001 Canon Kabushiki Kaisha Refractometer
D552736, May 02 2006 Kabushiki Kaisha Topcon Ophthalmic instrument
D589622, Nov 07 2007 Oculus Optikgeraete GmbH Autorefractokeratometer with integrated pachymeter
D698444, Aug 09 2011 I-Optics Scanning laser opthalmoscope
D705430, Mar 24 2011 Canon Kabushiki Kaisha Corneal tomography apparatus
Patent Priority Assignee Title
D244483, Apr 04 1975 Nerthus, Inc. Optical refraction testing instrument
D253909, Jul 08 1977 CAMBRIDGE INSTRUMENTS INC , A DE CORP Refractometer
D285485, Nov 25 1983 CAMBRIDGE INSTRUMENTS INC , A DE CORP Refractometer
D296004, Nov 21 1985 CAMBRIDGE INSTRUMENTS INC , A DE CORP Refractometer
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Jul 28 1988NISHIMURA, HIROSHICANON KABUSHIKI KAISHA, A CORP OF JAPANASSIGNMENT OF ASSIGNORS INTEREST 0049150790 pdf
Aug 09 1988Canon Kabushiki Kaisha(assignment on the face of the patent)
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