| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 4 | |
| #2 | United Kingdom | 4 | |
| #3 | Finland | 2 | |
| #4 | Germany | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Shafts |
| # | Name | Total Patents |
|---|---|---|
| #1 | Waldemar Heyman Knut | 1 |
| #2 | Heyman K W | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB155581A | Ball cage for ball bearings | |
| GB161142A | Improvements in or relating to sets of ball-bearings | |
| GB149644A | Improvements in or relating to ball bearings | |
| GB143648A | Improvements in or relating to ball-bearings |