Search Results for: Video recording apparatus
patent , improvements in steam engine and pump u.s. patent , improvement in atmospheric car-brake pipes u.s. patent , improvement in steam-power-brake couplings u.s. patent , improvement in valves for fluid brake-pipes u.s. patent , pneumatic pump u.s. patent , improvement in fluid-pressure brake apparatus
distribution u.s. patent , system for the protection of railroad-tracks and gas-pipe lines u.s. patent , fluid-meter u.s. patent , fluid-pressure automatic brake mechanism u.s. patent , alternating current electric meter u.s. patent , fluid-pressure automatic brake u.s. patent , switch and signal apparatus...
https://en.wikipedia.org/wiki/George_Westinghouse