Niels Anton Christensen | |
|---|---|
 | |
| Personal details | |
| Born | 16 August 1865 Denmark |
| Died | 5 October 1952 (aged 87) |
| Profession | Engineer and Inventor |
Niels Anton Christensen (16 August 1865 – 5 October 1952) was a Danish-American inventor whose principal invention was the O-ring, the ubiquitous hydraulic seal.