Inventor

Joel N. Harrison

Inventor

Campbell, CA, US

Overview

20→

Patents

1983–2018

Patent span

Physics

Primary field (CPC G)

Patents· 20 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 transducer54%

G06FElectric digital data processing19%

G01DMeasuring not specially adapted for a specific variable8%

G10DStringed musical instruments8%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests8%

H04LTransmission of digital information, e.g. telegraphic communication4%

PatentTitleYear

9,940,913Rotational pivot structure within single reed woodwind ligature system2018 8,940,988'Single reed woodwind ligature system adjusts to fit most mouthpiece sizes with excellent responsiveness through isolation of ligature from reed and mouthpiece vibrations'2015 6,622,164'Mass storage device with network interface'2003 6,128,717'Method and apparatus for storage application programming interface for digital mass storage and retrieval based upon data object type or size and characteristics of the data storage device'2000 5,379,439'Fixed disk drive mounted to printed circuit board'1995 5,119,254'Data transducer position control system for rotating disk data storage equipment'1992 4,920,434'Fixed disk drive'1990 4,872,074'Data transducer position control system for rotating disk data storage equipment'1989 4,860,194'A method for using a modular unitary disk file subsystem'1989 4,814,909'Data transducer position control system for rotating disk data storage equipment'1989 4,703,176'Compact polyphase optical position encoder'1987 4,660,106'Data transducer position control system for rotating disk data storage equipment'1987 4,639,863'Modular unitary disk file subsystem'1987 4,639,798'Disk drive having two interactive electromechanical control subsystems'1987 4,593,194'Optical encoder with digital gain compensation controlling source intensity'1986 RE032075'Data transducer position control system for rotating disk data storage equipment'1986 4,490,635'Pure torque, limited displacement transducer'1984 4,419,701'Data transducer position control system for rotating disk data storage equipment'1983 4,418,370'Band drive actuator'1983 4,396,959'Data transducer position control system for rotating disk data storage equipment'1983

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1983–2003Patents assigned to QUANTUM CORP (13)· patent assignee history

1983Patents assigned to XEROX CORP (1)· patent assignee history

1983–2018Based in Campbell, CA, US· patent location history

1987–1989Patents assigned to PLUS DEV CORP (3)· patent assignee history

1987–2003Based in Monte Sereno, CA, US· patent location history

2015Patents assigned to HARRISON JOEL N (1)· patent assignee history

2018Patents assigned to HARRISON JOEL NORVAL (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
QUANTUM CORP	13	1983–2003
PLUS DEV CORP	3	1987–1989
HARRISON JOEL Nself	1	2015
HARRISON JOEL NORVALself	1	2018
XEROX CORP	1	1983

Locations

Location	Patents	Span
Campbell, California, US	10	1983–2018
Monte Sereno, California, US	10	1987–2003