Did You Know...
...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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| Number | Title | Issue Date |
| 5070804 | Rotatable, automatic fin device notably for a sail board or analogous The invention concerns a directional fin of variable incidence at which are associated: two springs for returning the fin to central position and a symmetrical supple tooth fittings break the oscillations toward the exterior and facilitate the return move... | 12/10/1991 |
| 5057045 | Water ski brake A water ski brake apparatus includes a water ski having a tip, a tail, and a top and bottom, and having a vane attached to the bottom of the water ski. The water ski has a ski boot having a toe and heel with the front of the heel being hingedly attached t... | 10/15/1991 |
| 4949661 | Mechanical rudder stoppers The present invention discloses a device for restricting the movement of a hydraulically actuated rudder assembly on a large ocean-going vessel during failure of the hydraulic system. It comprises a half-collar made of a material that is substantially inc... | 08/21/1990 |
| 4915051 | Boat guidance stabilizer A stabilizer for controlling the steering of boats is made of an attachment plate, a friction controller and a spool; the attachment plate is attached to the tiller, rudder or an extension of either. The spool is mounted on the attachment plate and the fr... | 04/10/1990 |
| 4278040 | Braking rudder device This invention relates to braking rudder device consisting of turning rudder blade, horizontal plates and fixed rudder post, which is characterized by dividing the rudder blade in plane of symmetry in two blades, which are turning independently by an angl... | 07/14/1981 |
| 4237808 | Stern braking device This invention relates to stern braking device in a form of a shield, which is characterised by placing the shield behind the propeller and the rudder, which at top part has a concave cross section on both sides of plane of symmetry and a hydraulic stabil... | 12/09/1980 |
| 4080918 | Rudder control device A two-part hinge device for mounting on a tiller of a sailboat which is operable to confine and release a cross-line in a manner to lock a tiller in any desired position while the sailor is otherwise occupied.... | 03/28/1978 |
