| Patent Number |
Title Of Patent |
Date Issued |
| 5303265 |
Frequency independent encoding technique and apparatus for digital communications |
April 12, 1994 |
| A digital communication system using a frequency-independent, high data transmission rate, self-clocking, d.c. balanced data encoding technique. The encoding technique converts two NRZ data bits into a pulse or pulse-pair. The form of the pulse or pulse-pair representing the encoded |
| 4837675 |
Secondary storage facility empolying serial communications between drive and controller |
June 6, 1989 |
| A secondary storage facility having a drive and a controller employing multiple error recovery techniques; the controller signals the drive to try such techniques in sequence, according to descending a priori probability of success. The controller does not know or need to know the de |
| 4825406 |
Secondary storage facility employing serial communications between drive and controller |
April 25, 1989 |
| In a system including a plurality of mass storage devices at least one of which includes first and second ports, a plurality of controllers and cables coupling the ports to various ones of the controllers and in which each device can only be on-line through one port at a time, state |
| 4811279 |
Secondary storage facility employing serial communications between drive and controller |
March 7, 1989 |
| A radial bus for use in a secondary storage subsystem, between a mass storage drive and controller. The bus has four unidirectional bit-serial channels, two for carrying signals from drive to controllers. One channel carries real-time drive state information to the controller; another |
| 4811278 |
Secondary storage facility employing serial communications between drive and controller |
March 7, 1989 |
| In a data processing system including a host computer and a secondary storage system that includes a controller and a mass storage device, the device stores information regarding the physical and logical characteristics of a disk drive associated with the device. In response to a com |
| 4475212 |
Frequency-independent, self-clocking encoding technique and apparatus for digital communications |
October 2, 1984 |
| A self-clocking encoding technique for synchronous transmission of digital signals, and apparatus therefor. In an exemplary embodiment, the encoding technique utilizes relatively positive and negative pulses of fixed, predetermined duration. For electrical pulses, the point of reference |
