| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 5 | |
| #2 | WIPO (World Intellectual Property Organization) | 3 | |
| #3 | EPO (European Patent Office) | 2 | |
| #4 | Italy | 2 | |
| #5 | Japan | 2 | |
| #6 | Belgium | 1 | |
| #7 | Canada | 1 | |
| #8 | Germany | 1 | |
| #9 | France | 1 | |
| #10 | Netherlands | 1 |
| # | Technology | |
|---|---|---|
| #1 | Wheelchairs and sledges | |
| #2 | Cycle accessories | |
| #3 | Unspecified technologies | |
| #4 | Cycles |
| # | Name | Total Patents |
|---|---|---|
| #1 | Efros Boris | 13 |
| #2 | Borisu Efurosu | 2 |
| #3 | Efros B | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US7293789B1 | Wide power range bicycle with positive intuitive gear shifting system | |
| US4666174A | Wide powerful range bicycle | |
| US4421334A | High speed cycle | |
| IT8049402D0 | Bicycle oscillating pedal drive providing variable ratios | |
| US4226435A | Bicycle seat adjustable during ride | |
| JPS54122539A | Reciprocating pedal type bicycle | |
| US4161328A | Bicycle |