Vacuum tubes (H01J25/00, H01J31/00 - H01J40/00, H01J43/00, H01J47/00, H01J49/00 take precedence; details of vacuum tubes H01J19/00)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Vacuum tubes

CPC: Vacuum tubes (H01J25/00, H01J31/00 - H01J40/00, H01J43/00, H01J47/00, H01J49/00 take precedence; details of vacuum tubes H01J19/00)

Full Title

Full titles differ between systems:

IPC:

Vacuum tubes

CPC:

Vacuum tubes (H01J25/00, H01J31/00 - H01J40/00, H01J43/00, H01J47/00, H01J49/00 take precedence; details of vacuum tubes H01J19/00)

IPC and CPC are identically structured here. All 4 subcodes exist in both systems.

2 shared codes have differing titles between IPC and CPC.

Child Classifications

Navigate with arrow keys, Enter to open

H01J 21/02 Tubes with a single discharge path IPC+CPC Available in IPC and CPC
H01J 21/20 Tubes with more than one discharge path; Multiple tubes, e.g. double diode, triode-hexode IPC+CPC Available in IPC and CPC
H01J 21/34 Tubes with electrode system arranged or dimensioned so as to eliminate transit-time effect (with flat electrodes H01J21/36) IPC+CPC Available in IPC and CPC
H01J 21/36 Tubes with flat electrodes, e.g. disc electrode IPC+CPC Available in IPC and CPC