| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 7 | |
| #2 | United Kingdom | 3 | |
| #3 | United States | 3 | |
| #4 | Belgium | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machine tools | |
| #3 | Machines | |
| #4 | Optics | |
| #5 | Environmental technology |
| # | Technology | |
|---|---|---|
| #1 | Construction of roads | |
| #2 | Working stone | |
| #3 | Platform constructions | |
| #4 | Optical systems | |
| #5 | Percussive tools | |
| #6 | Climate change adaptation technologies | |
| #7 | Tools for connecting or disengaging |
| # | Name | Total Patents |
|---|---|---|
| #1 | Clarke Ronald A W | 10 |
| Publication | Filing date | Title |
|---|---|---|
| GB9213195D0 | Snow-plowable traffic lane marker | |
| GB9113044D0 | Snow-plowable traffic lane marker | |
| GB9013550D0 | Snow-plowable traffic lane marker | |
| CA1207174A | Traffic marker and housing | |
| CA1227075A | Colour varying reflector | |
| CA755872A | Acoustic shield for a tool powered by a gas-operated motor | |
| CA662891A | Motor vehicles adapted for use as mobile power supplying devices |