| # | Country | Total Patents | |
|---|---|---|---|
| #1 | EPO (European Patent Office) | 4 | |
| #2 | Republic of Korea | 4 | |
| #3 | China | 2 | |
| #4 | United States | 2 | |
| #5 | WIPO (World Intellectual Property Organization) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Electric discharge tubes | |
| #2 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Barratt David Steven | 10 |
| #2 | Holden Derek John | 10 |
| #3 | Den Engelsen Daniel | 3 |
| #4 | Daniel Den Engelsen | 1 |
| #5 | Barratt David S | 1 |
| #6 | Holden Derek J | 1 |
| #7 | John Barratt David Steven Hold | 1 |
| #8 | Steven Barratt David | 1 |
| #9 | John Holden Derek | 1 |
| Publication | Filing date | Title |
|---|---|---|
| KR20080073338A | Improvements in and relating to electrodes | |
| EP1949412A1 | Improvements in and relating to electrodes | |
| EP1831910A1 | Improvements in and relating to hollow cathodes and manufacturing method |