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 |
| 7191735 | Electric animal deterrent for contact with underlying ground system The present invention provides a high voltage pulse generator used for deterring animals where the high voltage pulses are delivered to the animal through an electrical conductor that lays directly on the ground and is not insulated from the underlying ground system... | 03/20/2007 |
| 6948452 | Electric animal deterrent for contact with underlying ground system The present invention provides a high voltage pulse generator used for deterring animals where the high voltage pulses are delivered to the animal through an electrical conductor that lays directly on the ground and is not insulated from the underlying ground system... | 09/27/2005 |
| 5906359 | Cattle gate and fence systems An improvement in fence systems adjacent cattle gates is provided. Specifically, the fence system provides a fence post having a bumper system such that in the event that a vehicle passing the fence system hits the upright, the risk of damage to the fence... | 05/25/1999 |
| 5595370 | Texas gate The Texas gate includes a base frame adapted to be set into a roadway and a deck assembly secured to said base frame. The deck assembly includes a series of spaced parallel elongated deck members arranged in groups. First and second groups of said deck me... | 01/21/1997 |
| 5419537 | Pop-up stock guard A portable cattle guard is provided which includes an assembled rectangularly shaped base member. Contained within the confines of the base member are a pair of inclined cattle ramps movably connected along their longitudinal axis to a smaller, spring bia... | 05/30/1995 |
| 5203544 | Cattle guard The disclosed cattle guard includes a base and grills which may easily be removed for cleaning without disturbing the adjacent roadway. The cattle guard includes side wings which are attached to the base to ease the removal of the grills. In a further asp... | 04/20/1993 |
| 5179801 | Portable cattle gate A cattle gate has a base frame adapted to rest on a ground surface. Upright end frames are secured to the base frame at opposite ends and suspend a grid over the center of the base frame using a spring and chain suspension. The gate is a unitary structure... | 01/19/1993 |
| 5160120 | Self retracting portable cattle guard A self retracting portable cattle guard (100) for connection between the gate posts (50, 50') in a gate opening and including a spring loaded reel mechanism (110) secured to one post (50) and provided with a flexible grid (120) having a cross bar (15) equ... | 11/03/1992 |
| 5131631 | Portable pitless livestock gate A portable pitless livestock barrier whereby vehicles or humans may easily gain access to a livestock enclosure but provides a deterrent to the unwanted passage of the livestock from such enclosure. The barrier is provided by having a horizontal main fram... | 07/21/1992 |
| 5099610 | Livestock barrier A portable livestock barrier is disclosed which includes a rigid metal panel of open grid construction that is arranged to rest in a normal operational position that is parallel to the ground to thus form a raised grid which livestock will not cross but w... | 03/31/1992 |
| 5072915 | Electric livestock guard An electric livestock guard or gate for prohibiting the passage of livestock through a roadway opening in a fenced enclosure and which includes a base portion of interlocking segments over which a metallic grid is suspended by springs which mount each end... | 12/17/1991 |
| 4921220 | Metal grid perimeter obstacle trap A continuous elongated trench is provided around a prison or military fortification. Parallel plates are provided on opposite side walls. Anti-personnel wires such as razor or barbed wire in concertina form are placed in the bottom or the trench. A light ... | 05/01/1990 |
| 4844423 | Pop-up stock guard A Portable Cattle Guard is provided which includes an assembled rectangularly shaped base member. Contained within the confines of the base member are a pair of inclined spring biased cattle ramps moveably connected along their longitudinal axis to provid... | 07/04/1989 |
| 4789137 | Knock-down cattle guard An elongated structure is provided including a pair of opposite end transverse end members and a plurality of laterally spaced apart and longitudinally extending bar members extending between and supported atop corresponding longitudinally spaced portions... | 12/06/1988 |
| 4655435 | Cattle guard A cattle guard has a grid with a plurality of spaced bars lying transverse to the direction of travel across the guard. The bars are supported by a plurality of spaced beams lying beneath the bars. The grid, in turn, is supported by a base in the ground. ... | 04/07/1987 |
| 4609184 | Pivoted gravity return fence extension for cattle guard A fence line is provided including a pair of spaced posts between which a fence opening is defined and wherein a cattle guard is substantially centered in the opening and spans considerably less than the width of the opening. A pair of edge upstanding pan... | 09/02/1986 |
| 4431166 | Garbage can mat A garbage can mat which encloses a garbage can or cans and acts as a barrier for dogs to prevent them from knocking over the garbage can or cans. The mat includes modules which are snap-fastened together at their adjoining end portions to form an enclosur... | 02/14/1984 |
| 3971546 | Animal crossing guard An animal crossing guard has a rectangular frame, bars extending across the frame at 45°, transverse members extending directly across the frame securing opposite frame members from spreading and supporting the bars intermediate their ends, and identical... | 07/27/1976 |
