Assertion: mercury's use | /r/HasProperty | invented by j. presper eckert
Facets:
value: in the mid-1940s
type: TEMPORAL
Source sentences:
text: Use of a delay line for a computer memory was invented by J. Presper Eckert in the mid-1940s for use in computers such as the EDVAC and the UNIVAC I. Eckert and John Mauchly applied for a patent for a delay line memory system on October 31, 1947; the patent was issued in 1953.