| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Australia | 5 | |
| #2 | EPO (European Patent Office) | 5 | |
| #3 | United States | 4 | |
| #4 | WIPO (World Intellectual Property Organization) | 3 | |
| #5 | Canada | 2 | |
| #6 | Taiwan | 1 |
| # | Industry | |
|---|---|---|
| #1 | Transport | |
| #2 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Wheelchairs and sledges | |
| #2 | Gearing |
| # | Name | Total Patents |
|---|---|---|
| #1 | Browning David L | 12 |
| #2 | Browning Bruce W | 7 |
| #3 | Browning Marc S | 6 |
| Publication | Filing date | Title |
|---|---|---|
| US5356349A | High-efficiency, high-speed control unit for chain shifter | |
| US5261858A | Method and system for computer-controlled bicycle gear shifting | |
| US5152720A | Bicycle transmission | |
| US5073152A | Bicycle transmission |