Shoe sole
US4307521A · kind A · utility
66Cited by
6References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 8, 1978 |
| Grant date | Dec 29, 1981 |
| Priority date | — |
| Expiry date | Jun 8, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29D35/122
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A shoe sole having at least one strip of protuberant wall or ridge formed on its ground-contacting surface so as to divide said surface into at least two sections, said adjacent sections being made from different shoe sole materials in color or in quality.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.