US2911871A
(en )
1959-11-10
Magnetic pick-up device
US2423339A
(en )
1947-07-01
Reproducing head for magnetic telegraphones
US1828189A
(en )
1931-10-20
Method of recording and reproducing wave frequencies
GB636190A
(en )
1950-04-26
Improvements in and relating to phonograph pickups
SU434455A1
(fr )
1974-06-30
US1827051A
(en )
1931-10-13
Recording and reproducing system and apparatus
US2866857A
(en )
1958-12-30
Phonograph pickup
US4051761A
(en )
1977-10-04
Method for adjusting the tone characteristic of tone generating elements and a device therefor
US2658950A
(en )
1953-11-10
Reproducer for magnetically recorded signals
US2105167A
(en )
1938-01-11
Sound recording and reproducing apparatus
US2494390A
(en )
1950-01-10
Electrical pickup
US2285079A
(en )
1942-06-02
Electromagnetic sound-reproducing device
GB588178A
(en )
1947-05-15
Improvements in or connected with electro-magnetic pick-up devices for use with stringed musical instruments
US2854529A
(en )
1958-09-30
Gramophone pick-up heads
GB396990A
(en )
1933-08-17
Improvements in loud speakers and other apparatus for interconverting electrical andacoustic vibrations
SU539318A1
(ru )
1976-12-15
Записывающа магнитна головка
SU1106027A1
(ru )
1984-07-30
Магнитна система стереофонической головки звукоснимател
US3049583A
(en )
1962-08-14
Magnetic recording means
US1284623A
(en )
1918-11-12
Telephonic recording and reproducing apparatus.
USRE17796E
(en )
1930-09-09
Phonograph reproducer
ES332160A1
(es )
1967-07-16
Una disposicion de cabezas magneticas para grabar y reproducir señales magneticas.
US1739228A
(en )
1929-12-10
Electrical reproducer for phonograph records
SU649023A1
(ru )
1979-02-25
Устройство дл воспроизведени со стереофонической грампластинки
US2984711A
(en )
1961-05-16
Gramophone pick-ups
US1771087A
(en )
1930-07-22
Phonograph