| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Spain | 4 | |
| #2 | Switzerland | 3 | |
| #3 | United Kingdom | 3 | |
| #4 | Austria | 1 | |
| #5 | Denmark | 1 | |
| #6 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Computer technology |
| # | Technology | |
|---|---|---|
| #1 | Data recognition and presentation |
| # | Name | Total Patents |
|---|---|---|
| #1 | Liedstrand Karl Emil Leonard | 6 |
| #2 | Emil Leonard Liedstrand Karl | 3 |
| Publication | Filing date | Title |
|---|---|---|
| GB130335A | Improvements in or relating to Machines for Forming Slots in Cards for Statistical or similar purposes. | |
| GB126624A | Improvements in Cards adapted for Statistical or similar purposes and Apparatus for Sorting the Cards. | |
| US1261413A | Cards adapted for statistic or similar purposes and apparatus for sorting the cards. | |
| GB101224A | Improvements in or relating to Cards for Statistical or similar purposes and in Apparatus for Sorting the Cards. |