| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Denmark | 9 | |
| #2 | United States | 5 | |
| #3 | Austria | 4 | |
| #4 | United Kingdom | 4 | |
| #5 | Switzerland | 2 | |
| #6 | Canada | 1 |
| # | Technology | |
|---|---|---|
| #1 | Wheelchairs and sledges | |
| #2 | Cycle brakes | |
| #3 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Olsen Frederik Johannes | 23 |
| #2 | Frederik Johannes Olsen | 2 |
| Publication | Filing date | Title |
|---|---|---|
| GB108479A | Improvements in Change-speed Hub Gears for Bicycles. | |
| US1249659A | Bicycle-hub. | |
| US1249658A | Free-wheel hub with a plurality of gears. | |
| GB191125679A | Improvements in Change-speed Hub Gears for Bicycles. | |
| GB191125680A | Improvements in Variable-geared Coaster Hubs for Bicycles. | |
| US1252939A | Free-wheel hub with a plurality of gears. | |
| US1249657A | Free-wheel hub. | |
| US1233600A | Multispeed drive with coaster-brake. | |
| CA270670A | Brake mechanism |