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Inventor

Spencer D. Roberts

Inventor
Tucson, AZ, US

Overview

6→
Patents
1977–2021
Patent span
Physics
Primary field (CPC G)

Patents· 6 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

G11Bprimary
G11BInformation storage based on relative movement between record carrier and transducer50%
G01CMeasuring distances, levels or bearings10%
G05BControl or regulating systems in general10%
G06FElectric digital data processing10%
G06KGraphical data reading10%
G06TImage data processing or generation, in general10%
PatentTitleYear
11,037,018Navigation augmentation system and method20215,128,913'Acquiring focus in an optical system using a soft focus acquiring system'19925,038,333'Positioning systems including reliable track crossing detection for high speed relative motions'19914,914,725'Transducer positioning servo mechanisms employing digital and analog circuits'19904,125,881'Tape motion control for reel-to-reel drive'19784,015,799'Adaptive reel-to-reel tape control system'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977–1992Patents assigned to IBM (5)· patent assignee history
1977–1978Based in San Jose, CA, US· patent location history
1990–1992Based in Tucson, AZ, US· patent location history
2021Patents assigned to ROSEMOUNT AEROSPACE INC (1)· patent assignee history
2021Patents assigned to SIMMONDS PRECISION PRODUCTS (1)· patent assignee history
2021Based in Burnsville, MN, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
IBM51977–1992
ROSEMOUNT AEROSPACE INC12021
SIMMONDS PRECISION PRODUCTS12021
Locations
LocationPatentsSpan
Tucson, AZ, US31990–1992
San Jose, California, US21977–1978
Burnsville, Minnesota, US12021