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...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 6583482 | Hetero-interface avalance photodetector An avalanche photodetector (APD) is made from composite semiconductor materials. The absorption region of the APD is formed in a n-type InGaAs layer. The multiplication region of the APD is formed in a p-type silicon layer. The two layers are bonded toget... | 06/24/2003 |
| 5321430 | Apparatus and method for gray and edge enhancement An apparatus and method for improving the printing and edge enhancement of laser printers comprises a video clock counter, an input selector, a calibration selector, a mode selector, a decoding array, a register, memory and an address counter. The gray an... | 06/14/1994 |
| 5313413 | Apparatus and method for preventing I/O bandwidth limitations in fast fourier transform processors A Quasi Radix-16 Butterfly comprises an radix-4 butterfly processor and on-board memory with external memory addressing changes from a conventional radix-4 butterfly processor. On-chip cache memory is included to store data outputs of the radix-4 butterfl... | 05/17/1994 |
| 5276840 | Disk caching method for writing data from computer memory including a step of writing a plurality of physically adjacent blocks in a single I/O operation A method for synchronously writing data from memory to a disk drive memory device minimizes the number of actual I/O operations by writing data to disk in large chunks. The method comprises the steps of: allocating an array for saving buffer pointers; map... | 01/04/1994 |
| 5270821 | Video display adjustment and on-screen menu system An EEPROM stores multiple sets of video display parameters for a multi-frequency video display. A microcontroller receives input from a user, changes the stored display parameters and outputs changes in the parameters to the video display. The microcontro... | 12/14/1993 |
| 5262933 | Control circuit for dual power supply having different start-up operating voltages A control circuit for a switching power supply. First and second transformers for outputting different voltages are controlled by first and second switches. The switches are controlled by first and second control means which are turned on when the applied... | 11/16/1993 |
| 5254890 | Ground bouncing reducing circuit and method A ground bouncing reducing circuit comprises a first control means, a second control means and an output means for generating an output signal at a fourth output terminal. The first control means generates a first control signal at a first output terminal... | 10/19/1993 |
| 5251174 | Memory system A memory system capable of incorporating defective memory chips is provided. The system includes a first memory chip having a first data signal line and being logically divided into an upper half and a lower half, a controlling circuit responsive to a fir... | 10/05/1993 |
| 5247209 | Supply independent constant output circuit having fast stabilization A constant output circuit wherein outputs are not a function of deviations of reference voltage. More specifically, the outputs maintain their logic "1" and logic "0" values, even when there are reference voltage noise or fluctuation in the circuit. This ... | 09/21/1993 |
| 5235698 | Bus interface synchronization control system The interface control system of this invention renders a high speed CPU compatible with low speed expansion devices such as expansion interfaces. The system causes the CPU clock signal to be in phase with the interface clock signal at the end of the last ... | 08/10/1993 |
| 5229758 | Display device controller and method A display device controller with improved read performance comprises video memory, a video display control unit, video processing logic, a write buffer and a read buffer. The write buffer and read buffer are coupled between a CPU and the video memory for ... | 07/20/1993 |
| 5224024 | Retaining frame for components of a personal computer A retaining frame for components of a personal computer comprises a horizontal portion, with a first section and a second section connected together; and a vertical portion attached substantially perpendicular to the first and second sections. The first s... | 06/29/1993 |
| 5215187 | Keyboard membrane keyswitch assembly A keyboard membrane keyswitch assembly comprises a housing, a button, a compression piston and a rubber element. The housing holds the compression piston and the rubber element. The compression piston preferably has a cylindrical shape with a vertical gui... | 06/01/1993 |
