| Patent Number |
Title Of Patent |
Date Issued |
| 4092492 |
Clockless serial data transfer |
May 30, 1978 |
| Method and apparatus are disclosed for the serial transfer of data in a clockless manner. Data is transmitted in the form of signal state changes from a dispatcher to a receptor. The receptor is operative to translate the signal state changes into data and thereafter signal the data |
| 4055735 |
Touch sensitive device |
October 25, 1977 |
| A touch sensitive device includes an arrangement of conductors in combination with a pressure sensitive electrically conductive material. The conductors appear in a cross-wire matrix imprinted on the top and bottom surfaces of a rigid printed circuit board. The pressure sensitive ele |
| 4013835 |
Data entry system |
March 22, 1977 |
| A novel data entry system is disclosed which comprises both a touch sensitive device and a location identification device. The touch sensitive device includes a printed circuit board arrangement of conductors which define data input locations that are touch sensitive. The locations are |
| 4002833 |
Rate independent signalling means |
January 11, 1977 |
| A method is disclosed wherein information can be conveyed serially over a signal path in a rate-independent fashion. Three or more signal states are employed for conveying information. The disclosed method consists of attaching meanings to changes of signalling state rather than the leng |
