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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 |
| 7190412 | Video switching systems and methods Systems and methods for performing video switching between multiple inputs and outputs are disclosed. In one embodiment, a system includes a video box coupled to one or more user interfaces, a plurality of video inputs, and a plurality of video outputs. The video bo... | 03/13/2007 |
| 7151432 | Circuit and method for a switch matrix and switch sensing Aspects of a switch matrix circuit are provided. In accordance with a circuit aspect, a plurality of switches are organized in a row and column configuration. Coupled to the plurality of switches is a current sensing circuit. The current sensing circuit includes a t... | 12/19/2006 |
| 6965299 | High-speed, low-power crossbar switch In a crosspoint switch, both input buses and output buses are driven at low swing. Self-timed, differential, push-pull, low swing driver circuits drive the input buses and are provided in the crosspoints to drive the output buses. Clocked, regenerative sense amplifi... | 11/15/2005 |
| 6943849 | Connection apparatus for CCTV systems A video signal connection apparatus comprises an array of individual video signal connector contacts arranged in a matrix having connector contact rows and connector contact columns, the individual video signal connector contacts extending in a first connection dire... | 09/13/2005 |
| 4727268 | Logic circuitry having two programmable interconnection arrays According to this invention a plurality of kinds of circuit blocks is formed as a circuit block area on a chip substrate to have a desired logic function. An array of signal output wires and array of signal input wires are formed adjacent the circuit bloc... | 02/23/1988 |
| 4717844 | Programmable logic array circuit with a decreased number of product terms A programmable logic array circuit which assumes terms which are not implicants to be DON'T CARE terms, and which produces a logic function having decreased number of product terms; and which has a logic function which eliminates the terms that have been ... | 01/05/1988 |
| 4382257 | N Indicator-switches connected for one of N selection by N wires Any number N of light emitting diode (LED) push-button indicator-switches are connected by one wire each to a corresponding N interconnected assemblages of four cross-coupled logical elements each. A pushbutton activated signal input through a one connect... | 05/03/1983 |
| 4084152 | Time shared programmable logic array This specification describes arrays for performing logic functions. In these arrays input variables are placed on a series of parallel input lines that intersect a number of parallel output lines in a grid of intersections. Field effect devices at these i... | 04/11/1978 |
| 4037089 | Integrated programmable logic array An integrated circuit comprising a programmable logic array includes an AND-gate array and an OR-gate array connected thereto with column lines of the AND-gate array being shared in common with column lines of the OR-gate array. The AND-gate array and the... | 07/19/1977 |
