| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 5 | |
| #2 | Switzerland | 4 | |
| #3 | Austria | 2 | |
| #4 | Spain | 2 | |
| #5 | Denmark | 1 | |
| #6 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Audio-visual technology | |
| #2 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Making needles | |
| #2 | Special information storage |
| # | Name | Total Patents |
|---|---|---|
| #1 | Knippenberg August | 13 |
| Publication | Filing date | Title |
|---|---|---|
| US1202739A | Stylus for talking-machine. | |
| GB191506684A | Improvements in or relating to Sound Recording and Sound Reproducing Machines. | |
| GB191304089A | Improved Manufacture of Crochet Hooks. | |
| GB190521543A | Improvements in and connected with Means for Fastening Springs to Wire Netting or the like. | |
| GB189718985A | Improvements in or relating to Sewing Needles. | |
| GB189423470A | Improvements in Hair Pins. |