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 |
| 7825345 | Reversely mounted tactile switch assembly and printed circuit board therewith A reversely mountable tactile switch assembly has a switch housing with switch terminals and an actuator button secured thereto on the same side of the housing, and can be used on a printed circuit board. The resulting printed circuit board provides for smaller unit... | 11/02/2010 |
| 7085490 | Density range control in a photograph by variation of hue density range of the negative A negative density range control system uses color hue contrast to provide a print of a picture, by comparing the relationship between negative hue density and print emulsion density requirement and providing an appropriate density for a printing process, whether co... | 08/01/2006 |
| 6309303 | Slip clutch for a tube cleaner A clutch device is adapted to fit onto a drive shaft of a standard water pressure cavity machine. The clutch device has a clutch body with a shaft receiving aperture at one end of the clutch body and a spring assembly at the other end of the clutch body. ... | 10/30/2001 |
| 6168276 | Road safety reflector A road safety reflector assembly has a pair of oppositely disposed finger cradles with a hollow, reinforceable housing, which has one or two reflectors mounted therein.... | 01/02/2001 |
