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Inventor

Douglas L. Manchester

Inventor
Rocklin, CA, US

Overview

6→
Patents
1984–2017
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.

G06Fprimary
G06FElectric digital data processing33%
G08BSignalling systems, e.g. personal calling systems25%
Y04SSystems integrating technologies related to power network operation, communication or information technologies for improving the electrical power generation, transmission, distribution, management or usage, i.e. smart grids25%
G06KGraphical data reading8%
LOCD18%
PatentTitleYear
9,792,803'Secure PIN entry device'20178,954,750'Secure PIN entry device'20158,621,235'Secure pin entry device'20137,898,413'Anti-tamper protected enclosure'20116,588,660'Passive contactless smartcard security system'2003D0272355'Data transmission multiplexer control panel'1984

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1984Patents assigned to HALCYON INC (1)· patent assignee history
1984Based in Santa Clara, CA, US· patent location history
2003Patents assigned to HEWLETT PACKARD DEVELOPMENT CO (1)· patent assignee history
2003Based in Applegate, CA, US· patent location history
2011–2017Patents assigned to VERIFONE INC (4)· patent assignee history
2011–2017Based in Rocklin, CA, US· patent location history
2013Patents assigned to BARROWMAN JOHN HENRY (1)· patent assignee history
2013Patents assigned to MANCHESTER DOUGLAS L (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
VERIFONE INC42011–2017
BARROWMAN JOHN HENRY12013
HALCYON INC11984
HEWLETT PACKARD DEVELOPMENT CO12003
MANCHESTER DOUGLAS Lself12013
Locations
LocationPatentsSpan
Rocklin, California, US42011–2017
Applegate, California, US12003
Santa Clara, California, US11984