CA443465A
(fr )
1947-08-05
Lampe a vide
CA445606A
(fr )
1947-12-16
Monture de lampe a vide
CA440220A
(fr )
1947-03-18
Pince pour enlever les lampes de radio
CA443261A
(fr )
1947-07-29
Appareil de lampe a vide
CA439573A
(fr )
1947-02-04
Systeme de lampe a vide
CA441281A
(fr )
1947-05-06
Lampe a electrons
AU135741B2
(en )
Electron tube
CA444666A
(fr )
1947-10-21
Lampe a electrons
CA444862A
(fr )
1947-11-04
Lampe a electrons
CA443559A
(fr )
1947-08-05
Lampe de reactance
CA445924A
(fr )
1947-12-30
Oscillateur
CA440141A
(fr )
1947-03-11
Oscillateur
AU138573B2
(en )
1947-06-19
Oscillator
CA442484A
(fr )
1947-06-24
Oscillateur
CA442881A
(fr )
1947-07-15
Lampe a frequence ultra-haute
AU139580B2
(en )
1947-10-02
Vacuum cleaners
CA439323A
(fr )
1947-01-21
Tube renforce
CA443129A
(fr )
1947-07-22
Lampe de braun
CA445423A
(fr )
1947-12-09
Structure de tube
CA444876A
(fr )
1947-11-04
Circuit de lampe a vide a frequence ultra haute
CA444435A
(fr )
1947-10-07
Lampe electronique
CA439083A
(fr )
1947-01-07
Aspirateur
CA441282A
(fr )
1947-05-06
Dispositif de lampe a electrons
CA442082A
(fr )
1947-06-10
Lampe de radio a haute frequence
CA445630A
(fr )
1947-12-16
Recipient a vide