Plumbing apparatus
US4532718A · kind A · utility
7Cited by
4References
17Claims
0Family size
Inventor
Key dates
| Filing date | Dec 30, 1983 |
| Grant date | Aug 6, 1985 |
| Priority date | — |
| Expiry date | Dec 30, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C9/36
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A plumbing apparatus including a circular spirit level attached to a straight edge body adapted to carry a reference point vertically wherein the level is large enough to span a hole in the floor with marking guides on the periphery to fix lines that pass through a central axis of the level with a rod attached to the level extending through the hole to align with a reference point with a template spanning a second hole to define the reference point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.