William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
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| Number | Title | Issue Date |
| 8100785 | Baseball area protection system and method This invention relates to an integrally weighted baseball cover and system, method and apparatus for quickly delivering the cover and placing it onto an area of a baseball field, such as one or more of the infield areas, such as home base area, first base area, seco... | 01/24/2012 |
| 8066591 | Portable retractable surface protection device An example portable, retractable surface protection device. The example device includes a rotatable support bar, a first support base positioned to a first end of the support bar, a second support base positioned to a second end of the support bar, and a surface cov... | 11/29/2011 |
| 8025595 | Baseball area protection system and method This invention relates to an integrally weighted baseball cover and system, method and apparatus for quickly delivering the cover and placing it onto an area of a baseball field, such as one or more of the infield areas, such as home base area, first base area, seco... | 09/27/2011 |
| 7901307 | Multifunctional protection system for a sports ground The present invention relates to a protection system for a sports ground comprising a frame-chest with a protection cover, said frame-chest being able to move across the entire length of the ground whilst unfolding or folding said protection cover by means of an unf... | 03/08/2011 |
| 7494433 | Baseball area protection system and method This invention relates to an integrally weighted baseball cover and system, method and apparatus for quickly delivering the cover and placing it onto an area of a baseball field, such as one or more of the infield areas, such as home base area, first base area, seco... | 02/24/2009 |
| 7270617 | Method for protecting at least one baseball area of a baseball playing field This invention relates to an integrally weighted baseball cover and system, method and apparatus for quickly delivering the cover and placing it onto an area of a baseball field, such as one or more of the infield areas, such as home base area, first base area, seco... | 09/18/2007 |
| 7195572 | Tennis court protection system A first surface is susceptible to inclement weather. The first surface has a pair of poles. A net is coupled between the poles. A cover has a lower face and a pair of sides. The cover has a plurality of wheels rotatably coupled to the cover. A drive assembly has a m... | 03/27/2007 |
| 7160213 | Baseball batter training method A batter training and protection system and method are shown. A protector for protecting an infield area is provided with a plurality of indicia situated thereon or integrally formed therein to define a plurality of target areas, respectively. The indicia may compri... | 01/09/2007 |
| 7128668 | Mat—adapted for use as a baseball or softball on-deck circle A mat that may be placed on a baseball or softball playing field for designating a batter on-deck area. ... | 10/31/2006 |
| 7086189 | Removable decorative basketball backboard signboard A sign for display on a basketball backboard includes a substantially rigid sheet of material having indicia to be displayed on a front surface thereof. The sheet of material includes a notch formed in a lower edge of the sheet of material for engaging rim. When the... | 08/08/2006 |
| 7052203 | Surfacing structure for traffic areas and for surfaces of structures The invention relates to a surfacing structure for traffic areas and for surfaces of structures, which has a substructure located on the base of the surfacing and has a superstructure, which covers the latter and is comprised, at least in part, of concrete, sepecial... | 05/30/2006 |
| 6901697 | Protective winter turf cover A protective winter turf cover is formed with a layered polyethylene laminated sheet with each layer having force striations running at an angle to the edge of the sheet and with the force striations of one layer at an angle to the force striations of the adjacent l... | 06/07/2005 |
| 6196938 | Removable basketball backboard cover A removable basketball backboard cover adapted to fit on a basketball backboard. The cover comprises a central portion and a leading edge portion. The central portion is adapted to extend across a front face of a basketball backboard and has an opening th... | 03/06/2001 |
| 5487541 | Ping pong table cover A cover for a regulation size ping pong table in which from helical turns about a centrally located support shaft the two ends of the cover are payed out in opposite directions for attachment to cooperating opposite ends of the table to protect the playin... | 01/30/1996 |
| 5440858 | Instant game court on a hard surface and process for applying the product thereto A system and process for forming an instant, fixedly attached but removable game court on any type of concrete, black-top, asphalt, or like outdoor hard surface, which allows a game involving frictional contact of the players with the hard surface to be p... | 08/15/1995 |
| 4738407 | Manipulating large sections of artificial turf A method of removably covering a smooth, rigid surface such as a floor, with a large section of heavy duty, artificial turf which involves pulling it across the surface while supported on a pneumatic cushion to minimize frictional drag and then relieving ... | 04/19/1988 |
| 4632329 | Thermal barrier device for winter recreation surfaces A thermal barrier device provides a heat insulative cover having low to negligible permeability to water vapor and a remote controlled reeling and unreeling mechanism for deploying and harvesting the cover onto and off of the exposed surfaces of ice rinks... | 12/30/1986 |
| 4588189 | Manipulating large sections of artificial turf Apparatus for manipulating large sections of non-rectangular shaped artificial turf which facilitates repeated covering and uncovering of a surface with such turf. The apparatus comprises at least one belt removably attached to an oblique margin of the ar... | 05/13/1986 |
| 4399954 | Manipulating large sections of artificial turf A method of removably covering a smooth, rigid surface such as a floor, with a large section of heavy duty, artificial turf which involves pulling it across the surface while supported on a pneumatic cushion to minimize frictional drag and then relieving ... | 08/23/1983 |
| 4301207 | Floor covering for indoor sports arena An indoor sports arena of the type having a massive floor structure, e.g. for tennis, track and other athletic events requiring a cushioned tread by the player or sportsman, comprises a resilient underlayment of open work structure which can be bonded to ... | 11/17/1981 |
| 4219941 | Moisture barrier for fruit drying trays and the like A barrier to minimize the percolation of moisture under fruit drying trays and the like, the barrier having a continuous panel of substantially impervious material folded to form walls positionable in peripherally conforming relation to a tray and being o... | 09/02/1980 |
| 4050972 | Laying down of large sheets of film A long plastic film roll is manufactured in situ for covering an agricultural, athletic or other field. A plurality of short plastic film rolls are supported on drivable rollers, which in turn are mounted on a plurality of spaced trucks extending along th... | 09/27/1977 |
| 3934421 | Ground stabilization matting A matting comprised of a plurality of continuous amorphous synthetic thermoplastic filaments having an equivalent diameter of about 0.1 to 2.0 millimeters is disclosed to be used for the ground stabilization of road beds. The filaments comprising the matt... | 01/27/1976 |