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Inventor

Donald A. Walker

Inventor
Los Gatos, CA, US

Overview

5→
Patents
1978–2017
Patent span
Physics
Primary field (CPC G)

Patents· 5 as inventor

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

B41Jprimary
B41JTypewriters14%
G01DMeasuring not specially adapted for a specific variable14%
G06FElectric digital data processing14%
G08BSignalling systems, e.g. personal calling systems14%
H04QSelecting14%
G03GElectrography7%
G06KGraphical data reading7%
G06QInformation and communication technology [ict] specially adapted for administrative, commercial, financial, managerial or supervisory purposes7%
G07FCoin-freed or like apparatus7%
PatentTitleYear
9,552,143'Systems and methods of interaction with water usage information'20178,618,941'Systems and methods of interaction with water usage information'20134,396,308'Ribbon guiding for thermal lift-off correction'19834,375,339'Electrically conductive ribbon break detector for printers'19834,101,905'Method for writing and viewing magnetic human readable characters and viewing means therefor'1978

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1978Patents assigned to NCR CO (1)· patent assignee history
1978Based in Kettering, OH, US· patent location history
1983Patents assigned to IBM (2)· patent assignee history
1983Based in Lexington, KY, US· patent location history
2013Patents assigned to AQUACUE INC (1)· patent assignee history
2013Patents assigned to JAVEY SHAHRAM (1)· patent assignee history
2013–2017Based in Los Gatos, CA, US· patent location history
2017Patents assigned to BADGER METER INC (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
IBM21983
AQUACUE INC12013
BADGER METER INC12017
JAVEY SHAHRAM12013
NCR CO11978
Locations
LocationPatentsSpan
Los Gatos, California, US22013–2017
Lexington, KY, US21983
Kettering, OH, US11978