| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 5 | |
| #2 | Canada | 4 | |
| #3 | United Kingdom | 3 | |
| #4 | Japan | 3 | |
| #5 | Mexico | 3 | |
| #6 | Germany | 2 | |
| #7 | France | 2 | |
| #8 | Australia | 1 | |
| #9 | Brazil | 1 | |
| #10 | German Democratic Republic | 1 | |
| #11 | EPO (European Patent Office) | 1 | |
| #12 | Greece | 1 | |
| #13 | Norway | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Engines, pumps and turbines | |
| #3 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Pumps | |
| #3 | Pistons and sealings |
| # | Name | Total Patents |
|---|---|---|
| #1 | Chammas Edmond D | 7 |
| #2 | Lewis Ii Edwin C | 4 |
| #3 | Lewis Edwin Charles Ii | 3 |
| #4 | Chammas Edmond Dib | 3 |
| #5 | Lewis Edwin C Ii | 2 |
| #6 | Edouin Chiyaarusu Ruisu Sekand | 2 |
| #7 | Edomondo Deibu Kamasu | 2 |
| #8 | Lewis Ii Edwin Charles | 1 |
| #9 | Chammas Edmond Die | 1 |
| #10 | Edouin Shii Ruisu Sekando | 1 |
| Publication | Filing date | Title |
|---|---|---|
| CA1148852A | Chemical cutting apparatus | |
| DD152608A5 | High pressure piston | |
| BR8001324A | Alternative course pump circulation pump | |
| US4270440A | High pressure piston and seal | |
| US4180131A | Chemical cutting apparatus for use in wells | |
| GB1565005A | Chemical cutting apparatus and method for use in wells | |
| GB1565004A | Chemical cutting appratus and method for use in wells |