This file is from the National Archives and Records dediCated-administration (NARA2), College Park, Maryland, R.G. 457 (Records of the National Security Agency), Box 808
Op-20-G/mel
SECRET
MEMORANDUM
15 June 1945
From: Lt. Cdr. R. H. Rose, USNR
To: Op-20-G-4
Subj: Patent Applications of NCR Company – Secrecy Order on.
1. It is propsed to recommend withdrawal of secrecy order on the following patent applications. Permission is requested thereafter.
488496 – Mumma
Electronic impulse generator for producing a burst of a precalculated number of pulses of unit value, under control of a key bank.
531694 – Mumma
Electron tube counting ring in which succeeding tubes are fixed in sequence.
453834 – Mumma
Device for producing impulses in bursts, that may be counted by an electronic counter. Controlled by keyboard.
519851 – Mumma
Device for producing impulses as above, with means for creating one impulse in tube anode circuit for each full operation of counting ring.
477096 – Mumma et al
Communication system in which data is transmitted as bursts of different numbers of identical signals. Electronic impulses as above are used to form symbols.
458546 – Desch et al
Communication system in which bursts of impulses are used as above.
523024 – Desch et al
Communication system as above. Divisonal case.
523025 – Desch et all
Communication system as above. Divisional case.
489506 – Desch et al
Plurality of gaseous discharge tubes in one envelope.
R. H. Rose
[in handwriting]
“OK to clear
488496
531694
489506
E”