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 |
| 4332469 | Optical multimeter An improved light intensity measuring device includes a temperature compensating logarithmic amplifier that changes photodetector currents which have been converted from AC to DC to a voltage which drives an analog to digital converter. The resulting digi... | 06/01/1982 |
