John J. Halsted & Son
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American patent agent John J. Halsted & Son was listed at address 614 F street, Washington, D.C.[1]
Patents for which John J. Halsted & Son was the patent agent
- Patent US-1885-320042 (Inventors: Frederick William Brearey, English title: Apparatus for effecting aerial navigation, Supplementary to patent: Patent US-1880-234947)
References
- ↑ Roster of registered U.S. patent attorneys 1883, p. 7.
