Christian door knocker
US4004547A · kind A · utility
6Cited by
4References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 9, 1975 |
| Grant date | Jan 25, 1977 |
| Priority date | — |
| Expiry date | May 9, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K1/07
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A Christian door knocker is described which has the form of a cross. The door knocker consists of a cross-shaped base and a knocking element disposed adjacent to the upright portion of the base for swinging movement with respect to the base.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.