Boomerang
US4452461A · kind A · utility
13Cited by
24References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 18, 1982 |
| Grant date | Jun 5, 1984 |
| Priority date | — |
| Expiry date | Aug 18, 2002 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B65/08
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A cross-stick boomerang has its leading edges or trailing edges substantially aligned. The outermost portion of each blade extends farther to the rear than does the general line of the trailing edge. In one version, an inner fin is provided inwardly of the outer fin, and in another version the hub portion is enlarged to provide a generally circular shape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.