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Re: Google Patents Tesla
Original poster: "Gary Peterson" <g.peterson@xxxxxxxxxxxx>
Could be METHOD OF SIGNALING, U.S. Patent No. 723,188, Mar. 17, 1903
and SYSTEM OF SIGNALING, U.S. Patent No. 725,605, Apr. 14, 1903.
Tesla's work on the "telautomaton" led him to devise methods for
selectively activating any of several wireless receivers that
involved multiple transmissions on multiple frequencies. At the
receiver, each one of the individual frequency components had to be
tuned in, in order for the receiver to respond-the AND logic
function. A patent application was submitted on July 16,
1900. During the review period, the Patent Office told Tesla that
another application for a similar concept had been received from
Reginald Fessenden, and in 1902 a U.S. Patent Interference
investigation ensued. Tesla's claims were supported and he was
granted the "System of Signaling" and "Method of Signaling"
patents-both describing the electronic AND-gate circuit. After WW II
when computer hardware manufacturers tried to patent digital logic
gates in general, the U.S. Patent Office asserted Tesla's
turn-of-the-century priority in their implementation. These same
patents also describe essential features of the spread-spectrum
techniques known as frequency-hopping and frequency-division
multiplexing. The Patent Interference proceedings transcript is in
NIKOLA TESLA: GUIDED WEAPONS & COMPUTER TECHNOLOGY, Leland Anderson,
Ed., Twenty First Century Books, 1998.
Original poster: <davep@xxxxxxxx>
A related, sort of inquiry:
It has been said that one of Tesla's patents
was cited as 'prior art' in early (1950ish?)
Solid State patent law.
Does anyone know which?
I've not heard it identified...