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...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.

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Class 104/271 - Pivoted ramp


Subclass of Class 104 - Railways
Definition: Car-replacing devices comprising a ramp or bar pivoted to
No. of patents: 1
Last issue date: 01/30/2001


NumberTitleIssue Date
6178893Adjustable hinged derail
A hinged derail is provided with an adjustment assembly for adjusting the position of the hinge pin relative to the rail. The hinged derail is adjustable to provide for proper alignment of the deflecting block with the top surface of a rail for a variety ...
01/30/2001
 
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