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Publication numberUS174942 A
Publication typeGrant
Publication dateMar 21, 1876
Filing dateJan 25, 1876
Publication numberUS 174942 A, US 174942A, US-A-174942, US174942 A, US174942A
InventorsE. Parmly Brown
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Improvement in dental rubber dams
US 174942 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

E. P. BROWN.

DENTAL RUBBER DAM. Nu174,942. Patented March 21,1876.

Fig. 2. Section all A B.

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*l WITNESSES: INVENTOR am Wm d @Qm'flmz .PETEK, PHOTO-UTHDGRAHIER, WASMINGTDN, D C.

.. NITE-D STATES PATENT OFFICE.

E. PARMLY BROWN, 0F FLUSHING, NEW YORK, ASSIGNOR TO HENRY GRAIK HOWELLS, 0F SAM-E PLACE.

Specification forming part of Letters Patent No. 174,942, dated March 21, 1876; application filed January 25, 1876.

To all whom it may concern Be it known that I, E. PARMLY BROWN, of Flushing, State of New York, have invented an Improved Dental Rubber Dam, of which the following is a specification:

The object of my invention is to produce a rubber dam for the use of dentists, which shall more nearly fit the mouth,and lie smoothly and more naturally thereinfvvith'out the puckeririg and wrinkling, and constant tendency to pull ofl' lrom the'tooth to which the present form of rubber dam is liable.- To this end I moldthe rubber in pieces of the proper size for use,

with a concave depression of an oval or other convenient shape, to suit the locations of the different teeth.

H. E. BLAKE, P. L. HULL.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US6648642 *Nov 26, 1997Nov 18, 2003Domonkos HorvathRubber dam
US7044738 *May 13, 2003May 16, 2006Duane Edward CoxSymmetrical rubber dam having a tooth gripping orifice
EP1042992A2 *Mar 31, 2000Oct 11, 2000Julian Dr. BrandesDental protection device for protecting a tooth