The Pantix from 1933 was the first X-ray tube with a disk-shaped rotating anode. This design was subsequently adopted by all tube manufacturers and forms the basis of rotating anode X-ray tubes to this day.
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Herzschrittmacher (1958)
In 1958, the engineer Rune Elmqvist revolutionized cardiology when he developed the first fully implantable cardiac pacemaker for Elema-Schönander, which later became Siemens-Elema.