| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 7 | |
| #2 | United Kingdom | 2 | |
| #3 | United States | 2 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Audio-visual technology |
| # | Technology | |
|---|---|---|
| #1 | Cables and insulators | |
| #2 | Advertising | |
| #3 | Distribution of electric power |
| # | Name | Total Patents |
|---|---|---|
| #1 | Bokelmann Heinrich | 2 |
| #2 | Hans Gastrow | 2 |
| #3 | Heinrich Bokelmann | 2 |
| Publication | Filing date | Title |
|---|---|---|
| GB280183A | Identifying marker for insulated conductors | |
| US1799881A | Marking means for electric conduits | |
| GB266655A | Identification label for insulated conductors |