| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 6 | |
| #2 | United Kingdom | 4 | |
| #3 | Belgium | 2 | |
| #4 | Switzerland | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Machine tools | |
| #3 | Mechanical elements | |
| #4 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Accessories for machine tools | |
| #3 | Gearing | |
| #4 | Shafts | |
| #5 | Sawing | |
| #6 | Vehicle drive control systems | |
| #7 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Gilbert Berthiez Frederick Cha | 5 |
| #2 | Gilbert Berthiez | 3 |
| #3 | Berthiez Societe Anonyme Des A | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2893273A | Safety release system for drilling machines and the like | |
| US2912875A | Drive transmission control | |
| US2835136A | Hydraulically controlled speed change apparatus | |
| GB756305A | Improvements in the mounting of carriages for machine tools | |
| GB753202A | Driving mechanism for imparting a reciprocal motion to a machine component | |
| GB755565A | Improvements in the driving of spindles of machine tools |