Inventor

Dah-Weih Duan

Inventor

Yorktown Heights, NY, US

Overview

37→

Patents

1998–2017

Patent span

Physics

Primary field (CPC G)

Patents· 37 as inventor

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

G06Kprimary

G06KGraphical data reading29%

H01QAntennas, i.e. radio aerials19%

G08BSignalling systems, e.g. personal calling systems12%

H10WGeneric packages, interconnections, connectors or other constructional details of devices covered by class h108%

H04NPictorial communication, e.g. television5%

B65DContainers for storage or transport of articles or materials, e.g. bags, barrels, bottles, boxes, cans, cartons, crates, drums, jars, tanks, hoppers, forwarding containers3%

H04LTransmission of digital information, e.g. telegraphic communication3%

G01RMeasuring electric variables2%

G01SRadio direction-finding2%

H01LSemiconductor devices2%

PatentTitleYear

9,843,301'Silicon transformer balun'2017 9,761,547'Crystalline tile'2017 9,431,715'Compact wide band, flared horn antenna with launchers for generating circular polarized sum and difference patterns'2016 8,049,625'High-performance mobile power antennas'2011 7,711,159'Multi-technology information capture system and method'2010 7,511,621'High-performance mobile power antennas'2009 7,324,555'Streaming while fetching broadband video objects using heterogeneous and dynamic optimized segmentation size'2008 7,246,369'Broadband video distribution system using segments'2007 7,143,433'Video distribution system using dynamic segmenting of video data files'2006 7,039,784'Video distribution system using dynamic disk load balancing with variable sub-segmenting'2006 7,002,475'Combination radio frequency identification transponder (RFID tag) and magnetic electronic article surveillance (EAS) tag'2006 6,925,499'Video distribution system using disk load balancing by file copying'2005 6,535,175'Adjustable length antenna system for RF transponders'2003 6,441,740'Radio frequency identification transponder having a reflector'2002 6,400,274'High-performance mobile power antennas'2002 6,329,915'RF Tag having high dielectric constant material'2001 6,320,509'Radio frequency identification transponder having a high gain antenna configuration'2001 6,285,342'Radio frequency tag with miniaturized resonant antenna'2001 6,281,794'Radio frequency transponder with improved read distance'2001 6,259,408'RFID transponders with paste antennas and flip-chip attachment'2001 6,249,227'RFID integrated in electronic assets'2001 6,243,013'Cascaded DC voltages of multiple antenna RF tag front-end circuits'2001 6,239,703'Communication pad structure for semiconductor devices'2001 6,236,223'Method and apparatus for wireless radio frequency testing of RFID integrated circuits'2001 6,215,402'Radio frequency identification transponder employing patch antenna'2001 6,201,474'Magnetic tape storage media having RFID transponders'2001 6,177,872'Distributed impedance matching circuit for high reflection coefficient load'2001 6,166,638'RF/ID transponder with squinted beam radiation pattern using dipole-over-ground plane antenna'2000 6,147,606'Apparatus and method for radio frequency transponder with improved read distance'2000 6,140,146'Automated RFID transponder manufacturing on flexible tape substrates'2000 6,121,878'System for controlling assets'2000 6,118,379'Radio frequency identification transponder having a spiral antenna'2000 6,104,291'Method and apparatus for testing RFID tags'2000 6,100,804'Radio frequency identification system'2000 6,097,347'Wire antenna with stubs to optimize impedance for connecting to a circuit'2000 6,028,564'Wire antenna with optimized impedance for connecting to a circuit'2000 5,767,789'Communication channels through electrically conducting enclosures via frequency selective windows'1998

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1998Patents assigned to IBM (1)· patent assignee history

1998–2000Based in Peekskill, NY, US· patent location history

2000–2010Patents assigned to INTERMEC IP CORP (26)· patent assignee history

2000–2007Based in Yorktown Heights, NY, US· patent location history

2001Based in Yorktown, NY, US· patent location history

2005–2008Patents assigned to INFOVALUE COMPUTING INC (3)· patent assignee history

2006Patents assigned to INFO VALUE COMPUTING INC (1)· patent assignee history

2008–2017Based in Torrance, CA, US· patent location history

2009–2011Based in Torrence, CA, US· patent location history

2016–2017Patents assigned to NORTHROP GRUMMAN SYSTEMS CORP (3)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
INTERMEC IP CORP	26	2000–2010
INFOVALUE COMPUTING INC	3	2005–2008
NORTHROP GRUMMAN SYSTEMS CORP	3	2016–2017
IBM	1	1998
INFO VALUE COMPUTING INC	1	2006

Locations

Location	Patents	Span
Yorktown Heights, New York, US	26	2000–2007
Torrance, California, US	5	2008–2017
Peekskill, New York, US	3	1998–2000
Torrence, California, US	2	2009–2011
Yorktown, New York, US	1	2001