U.S. patents available from 1976 to present.
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Icon_funbox Did You Know...

...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!

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Class 157/7 - Trestles and tanks


Subclass of Class 157 - Wheelwright machines
Definition: Trestles on which the wheel is mounted in combination with
No. of patents: 2
Last issue date: 02/19/1991


NumberTitleIssue Date
4993096Circuit board deburring system
An apparatus and method are disclosed for deburring the surface of a printed circuit board passing along a moving conveyor. The apparatus comprises a rotating brush head for abrading against the first surface of the printed circuit board. A three phase wa...
02/19/1991
4326315Film cleaner
A used roll of photostatic film is guided through a series of bunny brushes and vacuum nozzles to reclaim the film. The brushes pick particles from the film. The vacuum nozzles, connected to a blower, remove the particles from the brush. The reclaimed fil...
04/27/1982
 
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