| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 9 | |
| #2 | Canada | 2 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines | |
| #3 | Civil engineering | |
| #4 | Materials and metallurgy | |
| #5 | Engines, pumps and turbines |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Nails | |
| #3 | Earth drilling | |
| #4 | Building materials | |
| #5 | Pumps | |
| #6 | Machines for making railways | |
| #7 | Clutches and brakes | |
| #8 | Shafts |
| # | Name | Total Patents |
|---|---|---|
| #1 | Dunlap Joseph B | 11 |
| #2 | Bryan William D | 3 |
| Publication | Filing date | Title |
|---|---|---|
| US1274861A | Equalizing pump-jack. | |
| US1219382A | Pulley. | |
| US1170429A | Slip-joint for sucker and pull rods. | |
| US1147080A | Sucker-rod puller. | |
| US1153772A | Simplex rod-slip. | |
| US1109668A | Sucker-rod-pulling device. | |
| US1000590A | Railroad-crossing. | |
| US853006A | Pulley. | |
| CA86836A | Brick | |
| US721030A | Brick. | |
| CA205238A | Swing |