| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 10 | |
| #2 | Canada | 8 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Engines, pumps and turbines | |
| #3 | Machines | |
| #4 | Control |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Cyclically operating valves | |
| #3 | Shafts | |
| #4 | Pipes | |
| #5 | Systems controlling non-electric variables | |
| #6 | Servomotors |
| # | Name | Total Patents |
|---|---|---|
| #1 | Bertram Clarence C | 4 |
| #2 | Markel Charles | 2 |
| #3 | Casper Bertram Clarence | 2 |
| #4 | Bard Francis N | 2 |
| #5 | Charles Markel | 2 |
| #6 | Bertram Clarence Casper | 2 |
| #7 | Demarest Thomas W | 1 |
| #8 | Bard Francis Norwood | 1 |
| #9 | Mellor Clarence Leonard | 1 |
| #10 | Gray Thomas C | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2175752A | Flexible joint | |
| US2095728A | Ball joint | |
| US1975138A | Apparatus for fluid pressure regulation | |
| US1760910A | Crosshead and shoe | |
| US1756334A | Reversing-gear mechanism | |
| US1742946A | Reversing-gear mechanism | |
| US1764049A | Crosshead | |
| US1862173A | Reversing gear mechanism | |
| US1885173A | Reversing gear mechanism | |
| US1859909A | Reversing gear mechanism | |
| CA182896A | Gasket | |
| CA182895A | Train pipe coupling | |
| CA266905A | Locomotive reverse gear | |
| CA196386A | Blower valve | |
| CA236299A | Cross-head | |
| CA278142A | Reversing gear mechanism | |
| CA264142A | Reverse gear | |
| CA226322A | Cross head |