Famous Patents
William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 4255104 | System for casting and handling concrete railroad ties Concrete railroad crossties are mass-produced by slip-forming concrete using a specially adapted continuous casting machine to deposit concrete over a plurality of forms arranged side by side and end to end above an elongated casting bed. Each group of si... | 03/10/1981 |
| 4253817 | Concrete railroad tie casting and handling system A system for mass producing prestressed concrete railroad ties using a slip-forming method of casting concrete over a plurality of molds arranged side by side and end to end on a casting bed; a specially equipped continuous casting machine for slip-formin... | 03/03/1981 |
| 4242071 | Concrete railroad tie casting and handling system A system for mass producing prestressed concrete railroad ties using a slip-forming method of casting concrete over a plurality of molds arranged side by side and end to end on a casting bed; a specially equipped continuous casting machine for slip-formin... | 12/30/1980 |
| 4199030 | Method and apparatus for farming row crops A soil working implement for use in forming a raised soil bed is disclosed. The implement includes a carriage assembly and a plowing tool mounted for rotation on the carriage assembly. The plowing tool includes a cylindrical rim and an array of soil diggi... | 04/22/1980 |
| 4186166 | Method for producing concrete panel having fractured rib finish Method and apparatus for producing a concrete panel having a fractured rib finish is disclosed. A quantity of relatively low slump concrete mixture is cast upon a pallet in the form of a panel and is extruded to define projecting ribs and channels. The ca... | 01/29/1980 |
| 4088112 | Automatic rib breaker Method and apparatus for producing a concrete panel having a fractured rib finish is disclosed. A quantity of relatively low slump concrete mixture is cast upon a pallet in the form of a panel and is extruded to define projecting ribs and channels. The ca... | 05/09/1978 |
