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Manufacturers Index - Bridgeport Machine Tool Works

Bridgeport Machine Tool Works
Bridgeport, CT, U.S.A.
Manufacturer Class: Metal Working Machinery

This page contains information on patents issued to this manufacturer.

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If you find a patent number or patent date by this manufacturer that is not on this list, please contact the Site Historian.

Key to Links for Patent Information

USPTO = U.S. Patent Office . Images of the actual patent can be viewed on the U.S. Patent Office web site but a special TIFF viewer must be installed with your browser in order properly work. More information on how to configure your computer to view these patents can be found at TIFF image Viewers for Patent Images.
DATAMP = Directory of American Tool And Machinery Patents . A sister site to VintageMachinery.org with information on patents related to machinery and tools. A much easier user interface than the USPTO's for finding information on machinery patents.

Patent Number Date Title Name City Description
408,291 Aug. 06, 1889 Brake for Lathe Spindles Edward P. Bullard Bridgeport, Fairfield County, CT
410,146 Sep. 03, 1889 Screw Cutting Machine Edward P. Bullard Bridgeport, Fairfield County, CT
511,736 Dec. 26, 1893 Attachment for boring-mills Charles Leon Libby Bridgeport, CT
514,719 Feb. 13, 1894 Boring-mill Charles Leon Libby Bridgeport, CT