On this day in 1905 Marius Otto was granted the patent for Medical Ozonizer. U.S. Patent No. 790,655.
This patent relates to a process of ozonization for therapeutic purposes.
The medical ozonizer usually consists in principle of a small glass tube containing ozone, which is produced by Ruhmkorff coil, itself being operated by an ordinary vibrator or by a Wenhelt break; but reduced to these elements the ozonizer placed in the hands of patients presents a certain danger, because of the violence of the shocks of the Ruhmkorff coil. To obviate this serious drawback the Medical Ozonizer was invented.