| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 5 | |
| #2 | Canada | 4 | |
| #3 | EPO (European Patent Office) | 2 | |
| #4 | Australia | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Civil engineering | |
| #3 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Structural elements | |
| #3 | Grinding or polishing devices | |
| #4 | Unspecified technologies | |
| #5 | General building constructions |
| # | Name | Total Patents |
|---|---|---|
| #1 | Lockwood David N | 9 |
| #2 | Lockwood David N Ewart Street | 2 |
| #3 | Lockwood David N Ewart St Burn | 1 |
| Publication | Filing date | Title |
|---|---|---|
| AU4559889A | Improved drill bit sharpener | |
| US4916867A | Drill bit sharpener | |
| CA1273177A | Building panels | |
| US4862652A | Building panels | |
| US4776139A | Building panels | |
| CA1230229A | Drill bit sharpening device | |
| US4658549A | Drill bit sharpening device | |
| US4672780A | Building panels |