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Inventor

David B. Blackford

Inventor
North Oaks, MN, US

Overview

11→
Patents
1992–2020
Patent span
Physics
Primary field (CPC G)

Patents· 11 as inventor

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

G01Nprimary
G01NInvestigating or analysing materials by determining their chemical or physical properties58%
B03CMagnetic or electrostatic separation of solid materials from solid materials or fluids11%
B67DDispensing, delivering or transferring liquids, not otherwise provided for11%
G01FMeasuring volume, volume flow, mass flow or liquid level11%
C02FTreatment of water, waste water, sewage, or sludge5%
Y10TTechnical subjects covered by former us classification5%
PatentTitleYear
10,697,879Colloid size distribution measurement technology20209,958,371Colloid size distribution measurement technology20189,086,350'Particle concentration measurement technology'20158,552,719'Method and apparatus for the purification and analytical evaluation of highly purified liquids'20138,272,253'Particle concentration measurement technology'20127,852,465'System for measuring liquid flow rates'20107,777,868'System for measuring non-volatile residue in ultra pure water'20105,374,396'Syringe injection system for measuring non-volatile residue in solvents'19945,351,523'Apparatus and process for determining filter efficiency in removing colloidal suspensions'19945,121,988'Single particle detector method and apparatus utilizing light extinction within a sheet of light'19925,098,657'Apparatus for measuring impurity concentrations in a liquid'1992

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1992–1994Patents assigned to TSI INC (4)· patent assignee history
1992–1994Based in St. Paul, MN, US· patent location history
2010–2015Based in North Oaks, MN, US· patent location history
2012–2015Patents assigned to BLACKFORD DAVID (2)· patent assignee history
2012–2015Patents assigned to CT ASSOCIATES INC (2)· patent assignee history
2012–2015Patents assigned to GRANT DONALD C (2)· patent assignee history
2018–2020Patents assigned to FLUID MEASUREMENT TECH INC (2)· patent assignee history
2018–2020Based in White Bear Lake, MN, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
TSI INC41992–1994
BLACKFORD DAVIDself22012–2015
CT ASSOCIATES INC22012–2015
FLUID MEASUREMENT TECH INC22018–2020
GRANT DONALD C22012–2015
Locations
LocationPatentsSpan
North Oaks, Minnesota, US52010–2015
St. Paul, Minnesota, US41992–1994
White Bear Lake, Minnesota, US22018–2020