| Roles | Competed in Olympic Games | |
|---|---|---|
| Sex | Male | |
| Full name | Karl Konrad•Biefer | |
| Used name | Karl•Biefer | |
| Other names | Charles Biefer | |
| Born | 1896 | |
| Died | 30 August 1970 in Arbon, Thurgau |  SUI |
| Affiliations | SC Arbon — Arbon, Thurgau | SUI |
| NOC | Switzerland | SUI |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1920 Summer Olympics | Water Polo (Aquatics) | SUI |
Karl Biefer | |||
| Water Polo, Men (Olympic) | Switzerland | =9 | ||||
| 1924 Summer Olympics | Water Polo (Aquatics) | SUI |
Karl Biefer | |||
| Water Polo, Men (Olympic) | Switzerland | =10 |
