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Inventor

Arthur Calderon

Inventor
Minnetonka, MN, US

Overview

7→
Patents
1978–1998
Patent span
Physics
Primary field (CPC G)

Patents· 7 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 transducer55%
Y10TTechnical subjects covered by former us classification18%
G01RMeasuring electric variables9%
H01JElectric discharge tubes or discharge lamps9%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests9%
PatentTitleYear
5,712,565'MR sensor having thick active region between two thinner inactive MR regions topped with respective permanent magnets'19985,646,804'Thin film magnetic head having polymer on broken flux guide sections, method of producing and integrated structure incorporating same'19974,992,901'Self aligned magnetic poles using sacrificial mask'19914,667,260'Thin film vertical recording head'19874,564,585'Process for fabricating negative pressure sliders'19864,182,643'Method of forming gaps in magnetic heads'19804,119,881'Ion beam generator having concentrically arranged frustoconical accelerating grids'1978

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1978–1980Patents assigned to CONTROL DATA CORP (2)· patent assignee history
1978–1998Based in Minnetonka, MN, US· patent location history
1986–1987Patents assigned to MAGNETIC PERIPHERALS INC (2)· patent assignee history
1991–1998Patents assigned to SEAGATE TECHNOLOGY (2)· patent assignee history
1997Patents assigned to PHILIPS ELECTRONICS NA (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
CONTROL DATA CORP21978–1980
MAGNETIC PERIPHERALS INC21986–1987
SEAGATE TECHNOLOGY21991–1998
PHILIPS ELECTRONICS NA11997
Locations
LocationPatentsSpan
Minnetonka, Minnesota, US71978–1998