Building block
US7063587B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 4, 2005 |
| Grant date | Jun 20, 2006 |
| Priority date | — |
| Expiry date | Feb 4, 2025 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63H33/086
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A building block includes two perpendicularly connected square frames, and a hypotenuse frame extended between outer edges of the two square frames. Each of the square and hypotenuse frames has an outer frame portion and an inner cross-shaped rib portion having a thickness twice as large as that of the outer frame portion. The cross-shaped rib portion divides a space enclosed in each frame into four equal divisions, which are four cavities on one of the two square frames; two diagonally opposite round connecting posts and two diagonally opposite cavities on the other square frame; and two diagonally opposite connecting protrusions and two diagonally opposite rectangular cavities on the hypotenuse frame, so that a plurality of the building blocks could be assembled together in different manners to form changeful shapes via engagement of the cavities with corresponding connecting posts or protrusions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.