Protractor
US6553676B1 · kind B1 · utility
5Cited by
24References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 28, 2000 |
| Grant date | Apr 29, 2003 |
| Priority date | — |
| Expiry date | Nov 28, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43L7/10
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A protractor comprising a frame and a lever arm coupled thereto. The frame includes a first substantially straight edge and an elongate track adjacent to the first edge. The lever arm includes a second substantially straight edge and a channel which mateably engages the track of the frame. The channel/track combination couples the lever arm to the frame and permits the lever arm to rotate about an axis substantially orthogonal to the first and second edges. The first and second edges intersect at a point allowing a user to describe an angle between the two edges.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.