| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Austria | 4 | |
| #2 | Switzerland | 3 | |
| #3 | Denmark | 3 | |
| #4 | United Kingdom | 3 | |
| #5 | Spain | 2 | |
| #6 | Canada | 1 | |
| #7 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Medical technology | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Dentistry | |
| #2 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Penkala Eduard | 15 |
| Publication | Filing date | Title |
|---|---|---|
| CA104033A | Lead pencil | |
| GB190616715A | Improvements in Pencil-cases. | |
| US844395A | Tooth-brush. | |
| GB190603690A | Improvements in Pencil Cases. | |
| GB190601629A | Improvements in and relating to a Revolving Tooth-brush. |