| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Austria | 2 | |
| #2 | Canada | 2 | |
| #3 | Switzerland | 2 | |
| #4 | Denmark | 2 | |
| #5 | Spain | 2 | |
| #6 | United States | 2 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Electric incandescent lamps | |
| #2 | Tools for connecting or disengaging |
| # | Name | Total Patents |
|---|---|---|
| #1 | Eck Jacob Van | 10 |
| #2 | Fekkes Hendrik | 3 |
| #3 | Fekko Fekkes | 1 |
| #4 | Hendrik Fekkes | 1 |
| #5 | Fekkes Fekko | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US1935255A | Incandescent electric lamp | |
| ES126764A1 | Incandescent electric lamp. | |
| ES119604A1 | Improvements introduced in electric incandescent lamps. | |
| US1643633A | Open-end wrench of the adjustable-jaw type | |
| CA309982A | Electric incandescent lamp | |
| CA268400A | Wrench |