LexDanaLexDanabeta
Inventor

Robert M. Pettigrew

Inventor
Foxton, GB

Overview

28→
Patents
1977–2006
Patent span
Physics
Primary field (CPC G)

Patents· 28 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 transducer16%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests16%
G01DMeasuring not specially adapted for a specific variable15%
Y10TTechnical subjects covered by former us classification9%
G02BOptical elements, systems or apparatus5%
G06FElectric digital data processing5%
G06KGraphical data reading5%
B41JTypewriters4%
G01NInvestigating or analysing materials by determining their chemical or physical properties4%
G01VGeophysics4%
PatentTitleYear
7,030,782'Position detector'20066,624,916'Signalling system'20036,489,899'Position detector'20026,249,234'Position detector'20015,877,800'Optical data recording apparatus and method'19995,160,943'Printing systems'19925,149,211'Printers and ancillary systems'19925,118,608'Optical assay technique'19924,960,651'Magnetic devices'19904,940,966'Article detection and/or recognition using magnetic devices'19904,931,384'Optical assay technique'19904,928,132'Optical data storage medium'19904,893,299'Magneto-optic data storage technique'19904,802,736'Interferometers'19894,786,585'Image forming and data storage'19884,776,701'Displacement measuring apparatus and method'19884,758,307'Method of manufacturing a data storage medium'19884,733,968'Datum sensing using optical grating'19884,724,444'Data storage medium'19884,703,469'Optical data recording using radiation of different characteristics'19874,657,780'Manufacture of diffraction gratings'19874,636,076'Displacement measuring apparatus and method'19874,616,237'Data storage medium'19864,541,695'Zoom lens for cameras'19854,522,482'Information storage and retrieval'19854,486,870'Optical data storage'19844,051,367'Measurement apparatus'19774,049,965'Measurement apparatus'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977Patents assigned to NAT RES DEV (2)· patent assignee history
1977Based in Carluke, SC· patent location history
1984–1992Patents assigned to PETTIGREW ROBERT M (3)· patent assignee history
1984–2006Based in Cambridgeshire, GB· patent location history
1985–1992Based in Foxton, GB· patent location history
1987–1988Patents assigned to HEIDENHAIN GMBH DR JOHANNES (4)· patent assignee history
1988Patents assigned to PLASMON DATA SYSTEMS INC (2)· patent assignee history
1990–1992Patents assigned to ARES SERONO NV (2)· patent assignee history
1990Based in Cambridge, GB· patent location history
2003Based in Harston, GB· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HEIDENHAIN GMBH DR JOHANNES41987–1988
PETTIGREW ROBERT Mself31984–1992
ARES SERONO NV21990–1992
NAT RES DEV21977
PLASMON DATA SYSTEMS INC21988
Locations
LocationPatentsSpan
Foxton, GB151985–1992
Cambridgeshire, GB91984–2006
Carluke, SC21977
Harston, GB12003
Cambridge, GB11990