GNU MDK was written by Jose Antonio Ortega Ruiz[?] and is released under the GNU General Public license, so that users are free to share and improve it.
External links
... slipping friction. The device is covered by US patents 3,726,146 (1973) and 5,353,655 (1994) by L.A. Mishler and US patent 5,800,311 (1998) by ...