Direct reading grade rod with a sliding scale
US4471532A · kind A · utility
15Cited by
10References
29Claims
0Family size
Inventor
Key dates
| Filing date | May 25, 1983 |
| Grant date | Sep 18, 1984 |
| Priority date | — |
| Expiry date | May 25, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C15/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A direct reading grade rod as provided with a fixed scale having display windows therein and one or more sliding members slidable behind the fixed member and carrying a plurality of number sets, with different positions of the sliding member resulting in different sequences of numbers displayed in the windows.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.