| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 6 | |
| #2 | Germany | 2 | |
| #3 | Finland | 2 | |
| #4 | Netherlands | 2 | |
| #5 | United States | 2 | |
| #6 | Belgium | 1 | |
| #7 | EPO (European Patent Office) | 1 | |
| #8 | United Kingdom | 1 | |
| #9 | Norway | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Measurement | |
| #4 | Electrical machinery and energy |
| # | Technology | |
|---|---|---|
| #1 | Scaffolding | |
| #2 | General building constructions | |
| #3 | Testing of structures | |
| #4 | Structural elements | |
| #5 | Shaping of plastics | |
| #6 | Fillers | |
| #7 | Producing goods from plastic | |
| #8 | Electric switches |
| # | Name | Total Patents |
|---|---|---|
| #1 | Butts Ernest O | 7 |
| #2 | Butts Ernest Otto | 4 |
| #3 | Hall John Stuart | 3 |
| #4 | Wolkowski Stanley | 2 |
| #5 | Butts Nicholas E | 2 |
| #6 | Pinder Robert | 2 |
| #7 | Hakka Leo E | 2 |
| #8 | Otto Butts Ernest | 1 |
| #9 | Stuart Hall John | 1 |
| Publication | Filing date | Title |
|---|---|---|
| CA1248729A | Electric fusion welding of thermoplastic | |
| CA1235872A | Electric fusion welding of thermoplastic materials | |
| NL7904615A | Concrete floor supporting beam - has upper part cast into concrete of S or Z=section | |
| CA1002282A | End support shoe for composite joist | |
| CA978614A | Leak detection cable | |
| US3564526A | Pipeline leak detection device | |
| US3470340A | Leak detection apparatus | |
| CA775757A | Leak detection apparatus | |
| CA775758A | Pipeline leak detection device |