09-19-2023, 04:17 PM
From The Cejka Files
Cejka - Patent 2351055 Multi-wave Tube
Cejka - Patent 2279690.pdf (Size: 211.34 KB / Downloads: 8)
Cejka - Patent 2351055 Multi-wave Tube
Cejka - Patent 2279690.pdf (Size: 211.34 KB / Downloads: 8)