Parallelogram structure
US4042991A · kind A · utility
29Cited by
7References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 21, 1976 |
| Grant date | Aug 23, 1977 |
| Priority date | — |
| Expiry date | Jun 21, 1996 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01D15/124
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A portable structure which consists of a plurality of I beams placed side by side and hinged together in a parallelogram fashion such that adjacent I beams may be folded together.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.