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Inventor

Roger M. Needham

Inventor
Cambridge, GB

Overview

6→
Patents
1992–2008
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.

G01Sprimary
G01SRadio direction-finding27%
H04LTransmission of digital information, e.g. telegraphic communication18%
G01CMeasuring distances, levels or bearings9%
G06FElectric digital data processing9%
G07CTime or attendance registers9%
G08BSignalling systems, e.g. personal calling systems9%
H04WWireless communication networks9%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests9%
PatentTitleYear
7,353,384'Collapsing chained credentials'20086,720,922'Radio-frequency badge for location measurement'20046,079,021'Method and apparatus for strengthening passwords for protection of computer systems'20005,493,283'Locating and authentication system'19965,402,469'Carrier locating system'19955,088,091'High-speed mesh connected local area network'1992

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1992–2000Patents assigned to DIGITAL EQUIPMENT CORP (2)· patent assignee history
1992–1995Based in Coton, GB· patent location history
1995–1996Patents assigned to OLIVETTI RES LTD (2)· patent assignee history
1996–2008Based in Cambridge, GB· patent location history
2004–2008Patents assigned to MICROSOFT CORP (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
DIGITAL EQUIPMENT CORP21992–2000
MICROSOFT CORP22004–2008
OLIVETTI RES LTD21995–1996
Locations
LocationPatentsSpan
Cambridge, GB41996–2008
Coton, GB21992–1995