8005

Douglas Engelbart Signed Photograph

Currency:USD Category:Collectibles / Autographs Start Price:NA Estimated At:200.00 - 400.00 USD
Douglas Engelbart Signed Photograph

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Auction Date:2022 Mar 17 @ 18:00 (UTC-05:00 : EST/CDT)
Location:15th Floor WeWork, Boston, Massachusetts, 02108, United States
ALS - Autograph Letter Signed
ANS - Autograph Note Signed
AQS - Autograph Quotation Signed
AMQS - Autograph Musical Quotation Signed
DS - Document Signed
FDC - First Day Cover
Inscribed - “Personalized”
ISP - Inscribed Signed Photograph
LS - Letter Signed
SP - Signed Photograph
TLS - Typed Letter Signed
Glossy 8.5 x 11 photo of a diagram for Engelbart's magnetic logic device patent issued in 1963, entitled "Magnetic Logic Device," signed in the lower left in black felt tip, "Doug Engelbart." In fine condition.

This patent represents Engelbart's early work on magnetic logic devices, which are inherently more stable than vacuum tubes and transistors, draw no power when unused, and are impervious to electromagnetic interference. Though this technology was soon surpassed by the advent of the integrated circuit and the silicon chip, the reliability and stability of magnetic core devices made them useful for applications in extreme environments, such as spaceflight.