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 |
| 7110891 | Degaussing vulnerability display program Magnetic signature measurements are taken at various points corresponding to an original water depth beneath a ship. A computer processor receives and processes (i) this group of measured magnetic signature values and (ii) the designed magnetic signature value the s... | 09/19/2006 |
| 6539871 | Degradable practice mine A method for making a degradable practice mine including the steps of covering a flat work surface with a polyethylene sheet to serve as a release film, weighing out the materials in a ratio of 10 parts sand to 1 part polyvinyl alcohol (PVA), mixing 1 par... | 04/01/2003 |
| 6289819 | Paint ball land mine A paint ball land mine capable of propelling standard caliber paint balls during simulated war games is disclosed. The present paint ball land mine is designed to simulate the function of a U.S. military Claymore anti-personnel mine for purpose of marking... | 09/18/2001 |
| 5801322 | Exercise mine and programming and simulation device therefor The invention relates to an exercise mine system for training in mine detection. The invention including a passive oscillating circuit tuned to a certain frequency. This circuit being designed to be detected by another active oscillating circuit carried b... | 09/01/1998 |
| 5698813 | Visual indicator assembly A visual indicator assembly for use with an underwater mine system comprises a surface position marker (11) having a buoyancy device (23), the marker (11) being adapted to provide visual and/or audible indications on the surface that a mine has been "fire... | 12/16/1997 |
| 5216198 | Exercise mine An exercise mine has a ballast portion, a generally barrel-shaped body constituted by a single piece molded about the ballast portion and a plurality of U-shaped metal fitting members having terminal portions that form resilient tabs which project outside... | 06/01/1993 |
| 4690061 | Land mine for use in a simulated war game A weapon for use in a simulated war game which has the characteristics of a land mine and therefore does not require the user to be in proximity to a target when the weapon is activated. The weapon includes a housing having a first chamber adapted to cont... | 09/01/1987 |
| 4141295 | Actuation mine simulator An actuation mine simulator system which enables realistic training experce in mine sweeping operations without the danger accompanying use of live mines. The actuation mine simulator is preprogrammed to respond at predetermined time intervals to actuati... | 02/27/1979 |
