Hand-held interactive terminal
US4007443A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 1974 |
| Grant date | Feb 8, 1977 |
| Priority date | — |
| Expiry date | May 6, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S379/906
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An interactive terminal which is capable of complete hand-held operation with total freedom of position and location is provided. The terminal incorporates a self contained full 128-character keyboard, a 20-character alphanumeric readout, and a 1000-character memory. The terminal allows the generation of all 128 ASCII characters plus "break." In order to assure review of any message, a conveniently positioned scroll switch is incorporated to advance or roll back any messsage in the memory for presentation on the display. When previous messages are displayed and incoming information is being received by the terminal, the light intensity of the displayed messages modulates to indicate to the operator that information is being received but not displayed. The unique, totally portable, hand-held interactive terminal is provided with a 20 key keyboard which is operated with one hand, while the other hand selects one of four different information levels for each key. Consequently, each of the 20 keys is capable of transmitting four different characters or other information thereby assuring easy, compact transmission of all numeric, alphabetic, and punctuation characters, and command infor…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.