Famous Patents
The ice cream cone was invented at the St. Louis Worlds Fair by Ernest Hamwi in 1904. His waffle booth was next to an ice cream vendor who ran short of dishes. Hamwi rolled a waffle to hold ice cream and the cone was born.
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| Number | Title | Issue Date |
| 6269548 | Spin processing apparatus A spin processing apparatus can prevent contamination of workpieces by wear particles, and can operate at high efficiency while lowering the noise level associated with the operation of the apparatus. The spin processing apparatus includes a chamber, a sp... | 08/07/2001 |
| 4508354 | Moving piston with self-tightening sealing ring Packing or sealing moving in a hollow cylinder. Such a device, or moving piston with self-tightening ring, comprises two elements of cylindrical external outline such as a cylindrical rod integral with the first element slides in a cylindrical chamber delimite... | 04/02/1985 |
| 4009645 | Piston pump A piston pump comprising a cylindrical sleeve member, a tetrafluoroethylene plunger head contained within the sleeve member, at least one O-ring contained within a circular recess concentric with and extending axially from the lower transverse face of and... | 03/01/1977 |
