Pen nibs
US4221493A · kind A · utility
4Cited by
9References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1978 |
| Grant date | Sep 9, 1980 |
| Priority date | — |
| Expiry date | Aug 31, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43K1/12
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A porous pen nib comprising a plastics sheath and a fibrous core, preferably of textile yarn, has a writing tip formed by the rim of the mouth of the sheath and a protruding core center which both wear smoothly and equally in writing use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.