Writing instruments
US12070968B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 22, 2021 |
| Grant date | Aug 27, 2024 |
| Priority date | — |
| Expiry date | Nov 22, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB43L19/0075
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A writing instrument extending along an axis and comprising a writing tip and an eraser, a first helical cam propelling mechanism configured to move the writing tip along the axis between a retracted position and a protruded position and a second helical cam propelling mechanism configured to move the eraser along the axis between a retracted position and a protruded position, the first helical cam propelling mechanism comprising a first cam follower and a first helical cam, the second helical cam propelling mechanism comprising a second cam follower and a second helical cam, each of the first cam follower, the first helical cam, the second cam follower and the second helical cam being provided on distinct elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.