| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 13 | |
| #2 | Canada | 7 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Materials and metallurgy | |
| #3 | Machines | |
| #4 | Machine tools | |
| #5 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Special machines | |
| #2 | Cylinders for combustion engines | |
| #3 | Unspecified technologies | |
| #4 | Foundry moulding | |
| #5 | Casting metal | |
| #6 | Unspecified technologies | |
| #7 | Shafts | |
| #8 | Turning |
| # | Name | Total Patents |
|---|---|---|
| #1 | Rindsberg Harry D | 8 |
| #2 | Hartog Stephen D | 5 |
| #3 | Beckmann Melbourne A | 3 |
| #4 | Owen Robert J | 2 |
| #5 | Redmond Harold A | 2 |
| #6 | David Rindsberg Harry | 1 |
| #7 | Schnobrich John L | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US1768816A | Piston | |
| US1768815A | Piston | |
| US1764889A | Mold | |
| US1812696A | Piston | |
| US1770644A | Connecting rod | |
| US1732361A | Piston | |
| US1704018A | Mold | |
| US1696690A | Mold | |
| US1730885A | Piston | |
| US1699921A | Core-drilling process | |
| US1648194A | Mold | |
| US1538584A | Mold | |
| US1525893A | Metal mold | |
| CA289375A | Core drilling process | |
| CA291828A | Mould | |
| CA289706A | Mould | |
| CA252873A | Mould | |
| CA313853A | Piston | |
| CA299623A | Piston | |
| CA312436A | Piston mould |