| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 9 | |
| #2 | United States | 2 | |
| #3 | Belgium | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Mechanical elements | |
| #3 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Shafts | |
| #2 | Nails | |
| #3 | Measuring length, angles and areas |
| # | Name | Total Patents |
|---|---|---|
| #1 | Cumming James D | 12 |
| Publication | Filing date | Title |
|---|---|---|
| CA991458A | Rock bolting assembly | |
| CA964905A | Resin-bonded expansion shell | |
| US3312138A | Expansion shell for rock bolts | |
| US3133468A | Tension indicating device | |
| CA678786A | Tension indicating device | |
| CA851458A | Friction grip fasteners | |
| CA727380A | Tension indicating washer | |
| CA771896A | Expansion shell for rock bolts | |
| CA542885A | Snowshoe | |
| CA660827A | Bearing members for rock bolts | |
| CA802577A | Grouted rock bolt |