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 |
| 6077134 | Combination bicycle and boat A combination bicycle and boat has a frame; a buoyant rear wheel; and a buoyant front wheel driven by a pair of pedals. The frame is a rigid construction that supports the user on the front and rear wheels for mobility. The frame has a seat and rotatably ... | 06/20/2000 |
| 5938489 | Leg-powered boat A new leg-powered boat for propelling through water by using one's legs. The inventive device includes a boat portion defined by an open upper end, a closed lower end, forward and rearward ends, and opposed side walls extending between the forward and rea... | 08/17/1999 |
| 5702274 | Flotatation device propelled by human-powered ski machine A floatation device with propeller drive assembly and steerable rudder for use with a ski machine allowing an individual the ability to have a self propelled water craft. The device utilizes a ski machine having a rotating flywheel to provide power for th... | 12/30/1997 |
| 5584732 | Human-powered watercraft paddle propulsion system A human-powered, foot or hand operated paddle propulsion system for a variety of differently sized and configured watercraft. A rigid supporting subframe attaches the system to an end of the watercraft. A spaced-apart terminus is wedged towards a boat sea... | 12/17/1996 |
| 5090928 | Man-powered propulsion device A lightweight propulsion device for use with various types of lightweight boats and other small craft, including use with a swimmer is provided with a frame for mounting the propulsion device on the craft. A shaft rotatably supported on the frame carries ... | 02/25/1992 |
| 5021015 | Propulsion mechanism for a boat A propulsion mechanism for a boat includes a boat body; a bar being laterally provided on the boat body; a sliding block being provided on and slidable along the bar; a paddle being pivotally disposed on the sliding block and being submerged in water on w... | 06/04/1991 |
| 5000706 | Rocker type propulsion mechanism for a boat A rocker type propulsion mechanism for a boat includes a rocker arm pivotally provided on the boat, a lever arm being laterally connected to the rocker arm for rockably actuating the rocker arm, a paddle being pivoted on an other end of the rocker arm, an... | 03/19/1991 |
| 4795381 | Vessel and driving means The invention relates to a vessel which comprises a floating body upon which a seat for a person is mounted. The vessel is driven by human power through a treadle mechanism which drives a propeller. The treadle mechanism comprises two actuating elements which ... | 01/03/1989 |
| 4781630 | Muscular force actuated vehicle On the vehicle are mounted an actuation member, a force transmission unit and a drive element. Preferably, the actuation member is comprised of two levers, each of them being fixed to a metal cable each connected to a chain, the two chains actuating the w... | 11/01/1988 |
| 4413583 | Plastic lifeboats Sea-going lifeboats made of thin-walled, fiberglass-reinforced plastic (F-R P), with an oversupply of poured-in-place urethane foam in functionally advantageous spaces; having totally watertight or weathertight covers; with bow-pull hand-propeller replaci... | 11/08/1983 |
| 4158245 | Swimming device A swimming device has a body platform with straps for the arms and body of a swimmer. Cylinders extend longitudinally on the platform and are open at their forward ends and have restricted outlet nozzles in the rear. Pistons are slidably mounted in the cy... | 06/19/1979 |
| 4052912 | Pedal actuated drive mechanism A pedal actuated drive mechanism including two pedal structures to be actuated by the two feet of a user and preferably mounted to swing about an axis in two opposite directions, with the two pedals acting through a flexible cable or its equivalent to dri... | 10/11/1977 |
