Keywords: Queen Self Regulating X-ray Tube.jpg en This is an X-ray tube designed and patented by Henry Lyman Sayen while he was working for the James W Queen Company 2015-07-14 10 34 11 National Museum of American History Smithsonian Institution Accession File 302606 112 Eric Kearsley other versions PD-USGov X-ray equipment Uploaded with UploadWizard |