Activated work and method of forming same
US4656469A · kind A · utility
31Cited by
13References
15Claims
0Family size
Inventors
Key dates
| Filing date | May 30, 1986 |
| Grant date | Apr 7, 1987 |
| Priority date | — |
| Expiry date | May 30, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63F2009/0044
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
The present invention relates to a novel and unique activated work such as a child's book or a greeting card having at least two turnable pages in juxtaposed relationship and which is formed having a portion thereof that is essentially invisible in a first state but visible in a second state. Electrical signals are coupled to the second portion for selectively and reversibly changing the second portion from the invisible to the visible state when the pages are moved from their juxtaposed relationship.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.