DK3377C -
Procedure for recording and storing intelligence, signals and the like by means of magnetic effects on solid, magnetizable bodies.
- Google Patents
Procedure for recording and storing intelligence, signals and the like by means of magnetic effects on solid, magnetizable bodies.
DK3377D
Procedure for recording and storing intelligence, signals and the like by means of magnetic effects on solid, magnetizable bodies.
DK3377C
(en)
Procedure for the production of sound-reproducing plates, tapes and the like, and methods and apparatus for reproducing sound by means of such sound-plates.