Martin E. Wacha
6Patents
3h-index
5Co-inventors
46Inventor score
Filing activity: Dec 5, 1977 → Dec 16, 1994
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| USD288825S | Automatic pencil | General | 29 | Expired |
| USD286789S | Mechanical pencil | General | 24 | Expired |
| US4529328A | Projection-retraction mechanism for a writing instrument | Performing Operations; Transporting | 15 | Expired |
| USD252634S | Barrel tip assembly for a ball point pen | General | 1 | Expired |
| US5551788A | Writing instrument | Performing Operations; Transporting | 1 | Expired |
| USD252464S | Fountain pen nib | General | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.