|Publication number||USD91239 S|
|Publication date||Dec 26, 1933|
|Filing date||Oct 10, 1933|
|Publication number||US D91239 S, US D91239S, US-S-D91239, USD91239 S, USD91239S|
|Inventors||Otto G. Haussmann|
|Export Citation||BiBTeX, EndNote, RefMan|
|Referenced by (2)|
|External Links: USPTO, USPTO Assignment, Espacenet|
Dec. 26, 1933. o. G. HAUSSMANN Des. 91,239
QUIN FOCAL OPHTHALMIC LENS Filed Oct. 10, 1933 gmwwbot OTTO G. HAuss MANN Patented Dec. 26, 1933 UNITED STATES Des. 91,239
PATENT OFFICE DESIGN FOR A QUINFSOCAL OPHTHALMIC LEN Otto G. Haussmann, Philadelphia, Pa.
Application October 10, 1933. Serial No. 49,447
Term of patent 7 years figuration on the surface of the lens in the drawing represent the boundaries of fields of different focal power in an altogether transparent medium, made visible solely by the contrast in the bending of the light rays passing through the several fields.
The ornamental design for a quin-focal ophthalmic lens as shown and described.
OTTO G. HAUSSMANN.
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