Inventor

David B. Spruill

Inventor

Richmond, VA, US

Overview

3→

Patents

1987–1991

Patent span

Human necessities

Primary field (CPC A)

Patents· 3 as inventor

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

A24Fprimary

A24FSmokers' requisites40%

B65DContainers for storage or transport of articles or materials, e.g. bags, barrels, bottles, boxes, cans, cartons, crates, drums, jars, tanks, hoppers, forwarding containers40%

A24DCigars20%

PatentTitleYear

5,037,459'Device for controlling relative humidity within a substantially sealed container'1991 5,035,731'Device for controlling relative humidity within a substantially sealed container'1991 4,687,008'Filter cigarette'1987

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1987Patents assigned to PHILIP MORRIS INC (1)· patent assignee history

1987–1991Based in Richmond, VA, US· patent location history

1991Patents assigned to PHILIP MORRIS MANAGEMENT CORP (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
PHILIP MORRIS MANAGEMENT CORP	2	1991
PHILIP MORRIS INC	1	1987

Locations

Location	Patents	Span
Richmond, Virginia, US	3	1987–1991