Retrieval control apparatus for microfilm reader
US4738523A · kind A · utility
8Cited by
11References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 25, 1987 |
| Grant date | Apr 19, 1988 |
| Priority date | — |
| Expiry date | Aug 25, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/118
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention relates to a reader printer having a plurality of mode selection keys, ten-keys and a character display which displays a message indicating contents of input manipulations to be executed next with the ten keys in accordance with the mode selected by the mode selection keys whereby operating conditions of the reader printer under the selected mode are set by way of operator-to-machine conversation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.