Angle meter and spirit level
US7392593B2 · kind B2 · utility
8Cited by
11References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 3, 2004 |
| Grant date | Jul 1, 2008 |
| Priority date | — |
| Expiry date | Jul 26, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C9/24
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The angle meter and spirit level apparatus can be affixed to a ladder and used to determine the angle at which the ladder is placed. The apparatus is also self-verifying in that it provides a way to know that the apparatus is operating properly. The apparatus also allows for a ladder or other similar device to be used as a carpenter's level or mason's level to determine true horizontal and also to determine the slope from the horizontal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.