A selection of original creative intellectual property art based on actual patents at Fish IP Law.
The Fleming valve was the first practical vacuum tube and the first thermionic diode, whose purpose was to conduct current in one direction and block current flowing in the opposite direction. It was the forerunner of all vacuum tubes, which dominated electronics for 50 years.
The Weston cell is a wet-chemical cell that produces a highly stable voltage suitable as a laboratory standard for calibration of voltmeters. Invented by Edward Weston in 1893, it was adopted as the International Standard for EMF from 1911 until superseded by the Josephson voltage standard in 1990.
In 1918, Rueben Bechtold and Alfred Mellowes produced a refrigeration machine compact enough to fit under an appliance. Before that, the units were too large and so placed outside the home. Their company was unsuccessful, but was bought by General Motors and renamed Frigidaire, which improved this design to build the first household refrigerators.
Francis Blake invented a carbon microphone in 1877 for use in the telephone. Alexander Bell hired him, and his work with Emile Berliner produced a microphone that was standard with the Bell company for many years.