| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 7 | |
| #2 | United Kingdom | 3 | |
| #3 | United States | 2 |
| # | Industry | |
|---|---|---|
| #1 | Textiles and paper | |
| #2 | Computer technology | |
| #3 | Engines, pumps and turbines |
| # | Technology | |
|---|---|---|
| #1 | Typewriters | |
| #2 | Mechanically computing digital computers | |
| #3 | Cyclically operating valves |
| # | Name | Total Patents |
|---|---|---|
| #1 | Ellis Halcolm | 7 |
| #2 | Halcolm Ellis | 2 |
| Publication | Filing date | Title |
|---|---|---|
| US1539171A | Type-basket shift for typewriters | |
| US1539172A | Key-lever tension for typewriters | |
| GB146811A | Improvements in tensioning means for key levers of typewriters | |
| GB143613A | Improvements in and connected with actions for typewriters | |
| GB145393A | Improved case-shift mechanism for typewriters |