CA445595A
(fr )
1947-12-16
Systeme pour frequence ultra-haute
CA444568A
(fr )
1947-10-14
Systeme a haute frequence
AU143257B2
(en )
1947-10-30
Ultrahigh frequency systems
CA442881A
(fr )
1947-07-15
Lampe a frequence ultra-haute
CA442083A
(fr )
1947-06-10
Systeme d'oscillateur a haute frequence
CA445854A
(fr )
1947-12-30
Interrupteur a frequence ultra-haute
AU137982B2
(en )
1947-08-21
Frequency modulation system
AU137607B2
(en )
1947-05-01
Frequency modulation system
AU138459B2
(en )
1947-11-27
Frequency modulation system
CA444552A
(fr )
1947-10-14
Systeme de modulation de la frequence d'ondes
CA440411A
(fr )
1947-03-25
Systeme amplificateur a haute frequence
CA440028A
(fr )
1947-03-04
Systeme regulateur de frequence
CA440488A
(fr )
1947-04-01
Systeme de reglage de frequence
AU1544847A
(en )
1947-10-30
Ultrahigh frequency systems
CA439434A
(fr )
1947-01-28
Ondemetre a frequence ultra-haute
CA445901A
(fr )
1947-12-30
Systeme sterophonique de radio
CA442489A
(fr )
1947-06-24
Differentiel de frequences
CA440142A
(fr )
1947-03-11
Modulateur de frequence
CA444873A
(fr )
1947-11-04
Modulateur des frequences
AU1602547A
(en )
1947-11-27
Frequency modulation system
AU1389647A
(en )
1947-08-21
Frequency modulation system
AU1106647A
(en )
1947-05-01
Frequency modulation system
AU139525B2
(en )
Frequency generating systems
AU135934B2
(en )
1946-08-23
High frequency signalling system
CA442337A
(fr )
1947-06-17
Systeme de mesurage de frequence