| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 24 | |
| #2 | Canada | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machine tools | |
| #2 | Machines | |
| #3 | Civil engineering | |
| #4 | Mechanical elements | |
| #5 | Medical technology |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Percussive tools | |
| #3 | Earth drilling | |
| #4 | Servomotors | |
| #5 | Diagnosis and surgery | |
| #6 | Punching metal | |
| #7 | Handles for hand implements | |
| #8 | Pipes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hultquist Charles A | 25 |
| Publication | Filing date | Title |
|---|---|---|
| US1647628A | Drill-steel-retaining device | |
| US1626087A | Fluid-operated percussive tool | |
| US1758949A | Drill-steel-retaining device | |
| US1555212A | Pneumatic drill | |
| US1563633A | Pneumatic drill | |
| US1563632A | Pneumatic drill | |
| US1477353A | Rock-drilling engine | |
| US1452689A | Fluid-operated drill | |
| US1342540A | Fluid-operated tool | |
| US1390787A | Drilling-machine | |
| US1253828A | Drill-steel-retaining device. | |
| US1233477A | Drilling-machine. | |
| US1284108A | Drilling-machine. | |
| US1221862A | Drilling-machine. | |
| US1210321A | Rock-drill chuck. | |
| US1238018A | Steel-retainer. | |
| US1253827A | Pneumatic tool. | |
| US1077911A | Rock-drill. | |
| US1062651A | Chuck for rock-drills. | |
| US1040544A | Rock-drill. |