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 |
| 7339339 | Control system of floating mobile body An object of the invention is to provide a floating mobile object control system capable of causing a floating mobile object to stand still in a predetermined position with high precision or track a target trajectory with high precision, even under disturbances caus... | 03/04/2008 |
| 4933617 | Servo steering system for motor boats In a servo steering system for motor boats comprising a steering wheel which mechanically acts on the position of a hydraulic control valve, and a rubber cylinder connected to a hydraulic power unit by way of the control valve, the control valve comprises... | 06/12/1990 |
| 4757243 | Method and means for a regulator for the servo control of a marine craft Method and means for a regulator for the servo control of a marine craft, for instance a torpedo, with variable speed and angle of attack. A first sensor (1) monitors the angle of attack, while a second sensor (8) monitors the depth of the craft. A revolu... | 07/12/1988 |
| 4538230 | Method and apparatus for controlling altitude The invention provides a vertical velocity signal and an integration signal, respectively, of two detected ambient conditions. The signals are summed, in a selectable ratio, and compared with a predetermined altitude set point. When there is a difference ... | 08/27/1985 |
| 3995205 | Vehicle maneuvering control system A maneuvering control system particularly for use in controlling a vehicle such as a submarine or surface craft, which utilizes both manual and automatic control. Electrical signals in accordance with the manipulation of a manual control device are genera... | 11/30/1976 |
| 3940674 | Submarine or vehicle steering system Four direct current motor systems are controlled by a single hand grip cool device. Two of the motor systems have interacting control parameters while the remaining two are controlled independently of the other motor systems. The hand operated control me... | 02/24/1976 |
