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 |
| 7237510 | Mobile cattle hospital A moble cattle hospital that is adapted to be located near a pen of cattle for treatment operations. A gooseneck trailer forms a platform upon which various gates, fence panels, a squeeze chute, a squeeze pen and supplies are located for the treatment, or working, o... | 07/03/2007 |
| 7216605 | Animal management system An animal management system provides an alley to control the handling of animals when procedures are to be performed on the animals by veterinarians or cattle producers. The alley is formed by a base frame, and included therewith are a headgate and preferably two we... | 05/15/2007 |
| 7146933 | Calving enclosure A calving enclosure which is adapted to be placed permanently on the ground or which may be moved from one location to another for use during calving operations. The enclosure includes a pivotal alleyway which may be moved from a stowed position to an operative posi... | 12/12/2006 |
| 4924813 | Portable corral This is a portable loader for cattle, sheep and so forth and is to be pulled behind a truck. It include a loading chute having a ramp and sides and two trailing fence sides, each divided into two or more panel sections. The ramp and each section is provid... | 05/15/1990 |
| 4366775 | Transportable stock unit The invention relates to a transportable stock unit which comprises a stock race mounted on wheels and adapted to be towed behind a vehicle. The stock race has a number of wings swingably connected to the rear end thereof which can be swung out to form at... | 01/04/1983 |
| 4339147 | Equine ambulance An ambulance for the transport of sick or injured horses. The rear portion of the ambulance housing is selectively lowered into an inclined, ground engaging position for animal loading and unloading, and selectively raised into a standard, horizontal posi... | 07/13/1982 |
| 4301769 | Poultry loading apparatus Apparatus is provided for loading poultry from a rearing house into a series of hen-coops arranged in vertical rows on a transport vehicle. The apparatus includes an elevator conveyor which takes the animals from an assembly enclosure to a vehicle movable... | 11/24/1981 |
| 4201157 | Portable animal handling unit A wheeled frame having sidewalls and bed forming an animal walkway, and a self-contained hydraulic system to move the bed of carriage from an elevated travel position to a general ground level for passing animals through the unit, and a front elevating as... | 05/06/1980 |