Method of making an electronic calculator
US4141075A · kind A · utility
4Cited by
8References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 8, 1977 |
| Grant date | Feb 20, 1979 |
| Priority date | — |
| Expiry date | Nov 8, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49133
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Electronic calculators are manufactured by affixing conductors on an insulated substrate, by attaching tape-mounted semiconductor logic and display devices to selected conductors and by interconnecting the conductors with a keyboard. By using the method disclosed, the number of holes provided in the insulated substrate can be reduced or the use of such holes eliminated. Various embodiments of methods of manufacturing calculators are disclosed, along with the structure of such calculators.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.