Inventor

Donald B. Campbell

Inventor

Greenwood, SC, US

Overview

10→

Patents

1990–2020

Patent span

Mechanical engineering

Primary field (CPC F)

Patents· 10 as inventor

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

F24Fprimary

F24FAir-conditioning19%

A01CPlanting14%

B65DContainers for storage or transport of articles or materials, e.g. bags, barrels, bottles, boxes, cans, cartons, crates, drums, jars, tanks, hoppers, forwarding containers14%

F16LPipes14%

B22DCasting of metals10%

F16HGearing10%

Y10TTechnical subjects covered by former us classification10%

B32BLayered products, i.e. products built-up of strata of flat or non-flat, e.g. cellular or honeycomb, form5%

LOC075%

PatentTitleYear

10,767,892Insulated flexible duct using compressible core spacer and method of use2020 10,352,482Insulated duct with air gap and method of use2019 10,295,218Insulated duct with air gap and method of use2019 10,233,013Agriculturally active product2019 9,604,774'Agriculturally active product'2017 9,366,366'Flexible HVAC duct and method of use'2016 9,125,339'Agriculturally active product'2015 D0550041'Disposable serving bowl and lid'2007 5,111,872'Transmission casing cover with tubular mechanically crimped conduit cast in situ'1992 4,958,537'Transmission casing cover with tubular conduit cast in situ'1990

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1990–1992Patents assigned to SATURN CORP (2)· patent assignee history

1990–1992Based in Franklin, TN, US· patent location history

2015–2019Patents assigned to DOW AGROSCIENCES LLC (3)· patent assignee history

2016–2020Patents assigned to FLEXIBLE TECH INC (4)· patent assignee history

2016Patents assigned to CAMPBELL DONALD BRADLEY (1)· patent assignee history

2016Patents assigned to CARLAY II RONALD L (1)· patent assignee history

2016Based in Anderson, SC, US· patent location history

2017–2019Based in Indianapolis, IN, US· patent location history

2019Based in Greenwood, SC, US· patent location history

2020Based in Gallatin, TN, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
FLEXIBLE TECH INC	4	2016–2020
DOW AGROSCIENCES LLC	3	2015–2019
SATURN CORP	2	1990–1992
CAMPBELL DONALD BRADLEYself	1	2016
CARLAY II RONALD L	1	2016

Locations

Location	Patents	Span
Greenwood, SC, US	2	2019
Indianapolis, IN, US	2	2017–2019
Franklin, TN, US	2	1990–1992
Gallatin, TN, US	1	2020
Anderson, SC, US	1	2016