| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 5 | |
| #2 | United Kingdom | 4 | |
| #3 | United States | 3 |
| # | Industry | |
|---|---|---|
| #1 | Measurement | |
| #2 | Transport | |
| #3 | Basic materials chemistry | |
| #4 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Measuring speed and acceleration | |
| #2 | Vehicle transmission mounting | |
| #3 | Pigments | |
| #4 | Construction of roads | |
| #5 | Vehicle suspension arrangements |
| # | Name | Total Patents |
|---|---|---|
| #1 | Piero Gambarotta | 3 |
| Publication | Filing date | Title |
|---|---|---|
| GB354743A | Improvements in or relating to apparatus for indicating the speed of machines and vehicles | |
| US1724468A | Speed-indicating apparatus | |
| GB262725A | Improvements in or relating to speed indicating apparatus | |
| GB269472A | Improvements in or relating to speed indicating apparatus | |
| US1675974A | Speed-indicating device | |
| US1596345A | Speed-indicating apparatus | |
| GB207650A | Improvements in or relating to speed indicating apparatus |