| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 4 | |
| #2 | Switzerland | 2 | |
| #3 | Germany | 2 | |
| #4 | Finland | 2 | |
| #5 | Denmark | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Mechanical elements | |
| #3 | Chemical engineering | |
| #4 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Pipes | |
| #2 | Producing goods from plastic | |
| #3 | Shaping of plastics | |
| #4 | Unspecified technologies | |
| #5 | Cleaning | |
| #6 | Sewers |
| # | Name | Total Patents |
|---|---|---|
| #1 | Bremner Raymond M | 7 |
| #2 | M Bremner Raymond | 2 |
| #3 | Raymond M Bremner | 2 |
| #4 | Frew James M | 2 |
| #5 | Frew James Mcghee | 1 |
| Publication | Filing date | Title |
|---|---|---|
| CA874298A | Vibratory towing head | |
| CA911114A | Pipe cleaning tool | |
| CA864908A | Pipe relining method and apparatus | |
| CA889053A | Reaming tool |