Inventor

Robert W. Fayfield

Inventor

Excelsior, MN, US

Overview

1980–2009

Patent span

Physics

Primary field (CPC G)

Patents· 21 as inventor

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

LOC13primary

LOC1315%

G01VGeophysics12%

G05DSystems for controlling or regulating non-electric variables8%

H03KPulse technique8%

H05BElectric heating8%

G01DMeasuring not specially adapted for a specific variable4%

G01JMeasurement of intensity, velocity, spectral content, polarisation, phase or pulse characteristics of infrared, visible or ultraviolet light4%

G01RMeasuring electric variables4%

G01SRadio direction-finding4%

G05BControl or regulating systems in general4%

PatentTitleYear

7,492,276'Micro-processor controlled indicator device'2009 6,946,643'Retro-reflective photoelectric sensor'2005 D0471162'Housing for photoelectric control'2003 D0470462'Housing for photoelectric control'2003 6,285,021'Self checking safety switch'2001 D0442563'Housing for photoelectric control'2001 D0412316'Housing for photoelectric control'1999 5,777,557'Binary sensor with diagnostic signal superimposed on binary output'1998 5,644,730'Dual mode binary sensor for bus operation'1997 D0361057'Housing for photoelectric control'1995 5,254,846'Analog photosensor operating on the power from a standard 4-20 ma instrumentation current loop'1993 5,198,664'Photoelectric sensor assembly having compressible and sealing members'1993 5,087,838'Sourcing or sinking output circuit'1992 4,982,107'Sourcing or sinking output circuit'1991 4,965,548'Level indicator with alarm'1990 4,626,053'Sensing devices with modular interconnection and programming'1986 4,598,198'Automatic power control for modulated LED photoelectric devices'1986 4,376,450'Valve position monitor and control system'1983 4,369,401'Valve position monitor and control system'1983 4,356,393'Alignment indicator for photoelectric scanners'1982 4,217,492'Modular photoelectric switch'1980

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1980–2009Patents assigned to BANNER ENG (17)· patent assignee history

1980–2009Based in Excelsior, MN, US· patent location history

1983Patents assigned to SCOVILL MANUFACTURING CO (2)· patent assignee history

1990–2003Based in Shorewood, MN, US· patent location history

1995Patents assigned to FAYFIELD ROBERT W (1)· patent assignee history

1999Patents assigned to BANNER ENG CORPORATION (1)· patent assignee history

2003Based in Minneapolis, MN, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
BANNER ENG	17	1980–2009
SCOVILL MANUFACTURING CO	2	1983
BANNER ENG CORPORATION	1	1999
FAYFIELD ROBERT Wself	1	1995

Locations

Location	Patents	Span
Excelsior, Minnesota, US	12	1980–2009
Shorewood, Minnesota, US	8	1990–2003
Minneapolis, Minnesota, US	1	2003