Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
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| Number | Title | Issue Date |
| 7264585 | Apparatus for treating body ailments An apparatus and a method for treating ailments of the human body by electromagnetic waves arm described. The body part to be treated is located inside an induction coil and the coil is energized from a storage battery through the special switching device. The switc... | 09/04/2007 |
| 6781493 | Magnet assembly A magnet assembly for attaching to nails, bolts, metal shavings and other magnetic-conducting objects. The magnet assembly includes an elongate housing having side and end walls, and also having openings in the end walls; and also includes an assembly of producing m... | 08/24/2004 |
| 4972166 | Electromagnetic relay An electromagnetic relay has a base plate, a magnetic yoke mounted on the base plate, a relay winding, a spool core supporting the relay winding, a hinged armature arranged turnably on the spool core, a switching contact supported on the hinged armature, ... | 11/20/1990 |
| 4128851 | Hand held magnetic card encoder A manually manipulatable magnetic card encoder containing substantially all of the apparatus and wiring required to encode magnetic spots on a magnetic card key or the like. The encoder is relatively small and includes a housing provided with a pistol gri... | 12/05/1978 |
