Inventor

Charles W. Ragsdale

Inventor

Concord, CA, US

Overview

27→

Patents

1979–2015

Patent span

Chemistry

Primary field (CPC C)

Patents· 27 as inventor

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

C12Mprimary

C12MApparatus for enzymology or microbiology33%

C12NMicroorganisms or enzymes17%

H03KPulse technique13%

A61BDiagnosis6%

G01NInvestigating or analysing materials by determining their chemical or physical properties6%

A61NElectrotherapy4%

B01LChemical or physical laboratory apparatus for general use4%

G01RMeasuring electric variables4%

G06GAnalogue computers4%

F25BRefrigeration machines, plants or systems2%

PatentTitleYear

8,945,881'Localized temperature control for spatial arrays of reaction media'2015 8,222,909'Electroporation system with dial-in time constant'2012 8,221,299'Centrifugal force-based system for detection/treatment of membrane-encased structures'2012 8,043,838'Electroporation cuvette with spatially variable electric field'2011 8,017,381'Composite electroporation plate with interchangeable well inserts'2011 8,008,063'Individual-cell electroporation using area-focused electric fields'2011 7,943,367'High-throughput electroporation chamber with functional lid for risk reduction'2011 7,923,238'Multi-channel electroporation system'2011 7,799,555'Apparatus for high-throughput electroporation'2010 7,771,933'Localized temperature control for spatial arrays of reaction media'2010 7,750,605'Controlling an electrical signal sent to a sample load using a pulse modulated resistance'2010 7,576,549'Methods for measuring sample resistance in electroporation'2009 7,454,047'Imaging method and apparatus'2008 7,428,322'Imaging method and apparatus'2008 6,771,082'Resistance circuit stabilization and pulse duration control systems for electroporation instruments'2004 6,713,292'Electroporation cuvette insert for facilitating membrane-based fusion'2004 6,258,592'Electroporation cell with arc prevention/reduction'2001 5,729,426'Transfection high-voltage controller'1998 5,656,926'Transfection high-voltage controller'1997 5,642,035'Transfection high-voltage controller'1997 5,280,404'Arc detection system'1994 5,183,101'Circulating chiller for electrified solutions'1993 4,878,008'Contour-clamped homogeneous electric field generator'1989 4,750,100'Transfection high voltage controller'1988 4,344,037'System and method for analyzing tonosignals'1982 4,310,224'Precisely movable mirror mount'1982 4,164,863'System and method for analyzing tonosignals'1979

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1979–1982Patents assigned to CAVITRON CORP (3)· patent assignee history

1979–1982Based in Garden Grove, CA, US· patent location history

1982–2015Based in Concord, CA, US· patent location history

1988–2015Patents assigned to BIO RAD LABORATORIES (24)· patent assignee history

2012–2015Patents assigned to RAGSDALE CHARLES W (2)· patent assignee history

2015Patents assigned to ARCINIEGAS GERMAN (1)· patent assignee history

2015Patents assigned to CEREMONY JEFF (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
BIO RAD LABORATORIES	24	1988–2015
CAVITRON CORP	3	1979–1982
RAGSDALE CHARLES Wself	2	2012–2015
ARCINIEGAS GERMAN	1	2015
CEREMONY JEFF	1	2015

Locations

Location	Patents	Span
Concord, California, US	25	1982–2015
Garden Grove, California, US	2	1979–1982