Fountain pen with specific tubular nib
US4269528A · kind A · utility
0Cited by
11References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 8, 1980 |
| Grant date | May 26, 1981 |
| Priority date | — |
| Expiry date | Apr 8, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43K25/00
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A tubular nib having a beak-shaped section at one end of a tube, a slit formed in the beak-shaped section, and a slit-widening inhibiting section having a radius of curvature larger than that of the tubular part of the tubular nib at least at the section across the innermost end of the slit in the beak-shaped part of the tubular nib.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.