Did You Know...
...that when IBM conducted a market study of Chester Carlson's invention in 1959, the company concluded that it would take only 5000 units of his new product to saturate the market? IBM therefore declined to be part of the new product introduction. Too bad for IBM. Carlson's invention was the xerography process, and his new product was the beginning of the Xerox Corporation. It is estimated that every day, worldwide, 3,000,000,000 copies are made!!
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| Number | Title | Issue Date |
| 6000564 | Roller equipped uncoupling cam An uncoupling cam is incorporated into a hook-type coupler. Couplers of this variety are typically found on railway transit vehicles, one hook-type coupler being fixed to each end of each transit vehicle. Moving two transit vehicles toward each other so t... | 12/14/1999 |
| 5499728 | Electrically operated hook coupler with manual override An electrically operated hook-type coupler for attachment to an end of a railway transit vehicle for joining adjacent ends of a pair of such railway transit vehicles, in which a gathering core is provided at the forward end of a coupler head, with a hook ... | 03/19/1996 |
| 5014864 | Conveyor system A conveyor system, in particular a suspension conveyor system, comprising at least two transport units adapted to be moved on rollers and interconnected by a disconnectable coupling, the coupling including two identically formed hooks which are each provi... | 05/14/1991 |
| 4050588 | Automatic mine car coupling A mine car coupling assembly comprising a spring biased receiving assembly having a pair of jaw members mounted about a pivot point. The forward ends of the jaw members are beveled and tapered inwardly to form a hook configuration adapted to receive and h... | 09/27/1977 |
