| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 5 | |
| #2 | United Kingdom | 3 | |
| #3 | Germany | 2 | |
| #4 | France | 1 | |
| #5 | Italy | 1 | |
| #6 | Sweden | 1 |
| # | Industry | |
|---|---|---|
| #1 | Packaging and shipping | |
| #2 | Machines | |
| #3 | Control |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Elevators and escalators | |
| #3 | Systems controlling non-electric variables |
| # | Name | Total Patents |
|---|---|---|
| #1 | Risk Daniel W | 4 |
| #2 | Risk D W | 1 |
| #3 | Shrum William M | 1 |
| #4 | Risk Daniel | 1 |
| #5 | Shrum W | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4148248A | Hydraulic valve control system | |
| US4000754A | Automatic control valve for a fluid system | |
| GB1464143A | Valve mechanism for a hydraulic elevator | |
| US3896906A | Seismic sensing apparatus | |
| US3815710A | Seismic sensing apparatus |