Company
- Perryman Radio Tubes10
- E.T. Cunningham, Inc.8
- Majestic Radio Tubes8
- Radio Corporation of America7
- Sylvania Radio Tubes7
- RCA Radiotron6
- Cable Radio Tube Corporation5
- National Union Radio Tubes5
- De Forest Radio Company4
- Johnsonburg Radio Corporation4
- Tung-Sol Lamp Works, Inc.4
- Ken-Rad Radio Tubes3
- Arrow Radio Tubes2
- Lestein Corporation of America2
- Philco Corporation2
- Arcturus Radio Tube Company1
- Cable Tube Radio Corporation1
- Davis Company1
- Eimac Tubes1
- Ergon Electric Corp.1
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