Trisector
US5210951A · kind A · utility
4Cited by
2References
3Claims
0Family size
Inventor
Key dates
| Filing date | Aug 25, 1992 |
| Grant date | May 18, 1993 |
| Priority date | — |
| Expiry date | Aug 25, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43L13/002
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An instrument for trisecting an angle has two circular plates and four pointers. Two pointers are to define a given angle which can be an acute angle or obtuse angle. Two other pointers are to divide the given angle into three equal angles when they are perpendicular each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.