Patented and Distinctive Bit Braces & Augers, a Research Study
by
George Langford, Sc.D.
Updated December 9, 2016
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German brace(s)
American manufacturers with adequate resources could economically have their engineers and legal representatives examine proposed tool designs with a view towards picking long-used designs known for their ruggedness and ease of manufacture while avoiding infringement of active patents. This also was necessary in order to obtain protection of an innovative design or substantial improvement.
  

On the other hand, German manufacturers had a language barrier that increased the cost of navigating the United States' extensive patent literature and laws, so they generally chose an alternative plan: Follow the teachings of an expired U.S. patent, which the U.S. patent laws essentially required American inventors to make possible in order for the patent to be awarded in the first place.


Inventor/Maker
Representative Images
(can be enlarged)
Examples
found by GB

Expired
Patents

Patent Dates
(i.e., of the expired ones)

Directory of American
Toolmakers: active years

Barber; Peck/
Germany
Overall
Chuck apart 
12, 30 42,827
246,904
May 24, 1864
September 13, 1881

H.C. Hart/
Anonymous
Chuck; ratchet selector
138 207,964
September 10, 1878

H.L.Pratt; A. Shepard/
Germany
RatchetChuck apart
75 200,757
309,887
February 26, 1878
December 30, 1884

Obed Peck/
Germany
Chuck apart
116 246,904
September 13, 1881

L.L. Davis/
Fribrora D.R.P.
Chuck apart
115 432,180
July 15, 1890

H.V. Smith/
Craftsman
Chuck; ratchet selector
103 505,611
September 26, 1893

Giantgrip/
Germany
Chuck apart & ratchet selector
132 none
none