| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 5 | |
| #2 | EPO (European Patent Office) | 3 | |
| #3 | Japan | 2 | |
| #4 | Italy | 1 |
| # | Industry | |
|---|---|---|
| #1 | Packaging and shipping | |
| #2 | Machines | |
| #3 | Mechanical elements | |
| #4 | Control |
| # | Technology | |
|---|---|---|
| #1 | Elevators and escalators | |
| #2 | Unspecified technologies | |
| #3 | Systems controlling non-electric variables | |
| #4 | Venting or aerating devices | |
| #5 | Servomotors |
| # | Name | Total Patents |
|---|---|---|
| #1 | Blain Roy W | 11 |
| #2 | Roi Daburiyuu Burein | 1 |
| Publication | Filing date | Title |
|---|---|---|
| EP0908654A2 | Flow metering solenoid valve | |
| US5593004A | Servo control for hydraulic elevator | |
| US5232070A | Up leveling control system for small elevators | |
| US4800990A | Three speed valve control for high performance hydraulic elevator | |
| US4637495A | Pressure/viscosity compensated up travel for a hydraulic elevator | |
| US4601366A | Down valve for the down speed control of a hydraulic elevator |