| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 11 | |
| #2 | United Kingdom | 2 | |
| #3 | Germany | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Control | |
| #3 | Machine tools | |
| #4 | Electrical machinery and energy | |
| #5 | Optics | |
| #6 | Measurement | |
| #7 | Engines, pumps and turbines | |
| #8 | Mechanical elements |
| # | Name | Total Patents |
|---|---|---|
| #1 | Walter Ferris | 11 |
| #2 | Ferris John P | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2638850A | Piston assembly for axial type hydrodynamic machines | |
| US2266184A | Broaching machine | |
| US2212140A | Chronometric mechanism | |
| GB487894A | Improvements in or relating to control mechanism for controlling the speed of a prime mover | |
| US2143147A | Sectional drive | |
| US2238218A | Speed controller for prime movers | |
| US2163672A | Sectional drive | |
| US2069230A | Speed controller for prime movers | |
| US2198035A | Speed controller | |
| US2012423A | Blanking and forming press and method of forming blanks | |
| US1798198A | Pump | |
| US1619200A | Hydraulic transmission |