| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 5 | |
| #2 | Norway | 4 | |
| #3 | Denmark | 3 | |
| #4 | EPO (European Patent Office) | 3 | |
| #5 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Basic materials chemistry | |
| #4 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Blasting | |
| #3 | Detonating devices | |
| #4 | Perforating | |
| #5 | Explosive charges |
| # | Name | Total Patents |
|---|---|---|
| #1 | Lazari Lazaris | 12 |
| #2 | Smetham James Nigel | 12 |
| #3 | Brand Douglas | 3 |
| #4 | Smetham James | 1 |
| #5 | Lazari Lazaris G | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB8615904D0 | Explosion compensator | |
| EP0210758A2 | Apparatus for cutting a drill collar | |
| GB8615903D0 | Apparatus for severing a wellhead | |
| DK309486D0 | Eksplosionskompensator | |
| GB8610175D0 | An explosive cutting device | |
| US4667599A | Explosive cutting device with simultaneous detonation of opposite ends |