| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 4 | |
| #2 | South Africa | 3 | |
| #3 | Australia | 2 | |
| #4 | Brazil | 2 | |
| #5 | United States | 2 | |
| #6 | Denmark | 1 | |
| #7 | Italy | 1 | |
| #8 | Sweden | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines | |
| #3 | Control |
| # | Technology | |
|---|---|---|
| #1 | Clutches and brakes | |
| #2 | Unspecified technologies | |
| #3 | Unspecified technologies | |
| #4 | Teaching materials |
| # | Name | Total Patents |
|---|---|---|
| #1 | Barth H | 8 |
| #2 | Barth Harald | 2 |
| #3 | Pfaff A | 1 |
| #4 | Weber B | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB1447294A | Apparatus for demonstrating electric machines | |
| ZA7208377B | Flexible coupling | |
| GB1412630A | Flexible shaft coupling |