Inventor

David A. Bergstrom

Inventor

Mendham, NJ, US

Overview

3→

Patents

1987–2015

Patent span

Performing operations

Primary field (CPC B)

Patents· 3 as inventor

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

A61Kprimary

A61KPreparations for medical, dental or toiletry purposes11%

A61PSpecific therapeutic activity of chemical compounds or medicinal preparations11%

B08BCleaning in general11%

B29BPreparation or pretreatment of the material to be shaped11%

B29KIndexing scheme associated with subclasses b29b, b29c or b29d, relating to moulding materials or to materials for moulds, reinforcements, fillers or preformed parts, e.g. inserts11%

B29LIndexing scheme associated with subclass b29c, relating to particular articles11%

B65GTransport or storage devices, e.g. conveyors for loading or tipping, shop conveyor systems or pneumatic tube conveyors11%

F26BDrying solid materials or objects by removing liquid therefrom11%

Y02WClimate change mitigation technologies related to wastewater treatment or waste management11%

PatentTitleYear

9,186,321'Oral spray formulations and methods for administration of sildenafil'2015 5,595,349'Continuous flow rotary materials processing apparatus'1997 4,699,548'Slurry conveying system'1987

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1987Patents assigned to HOWDEN ENVIRONMENTAL SYSTEMS (1)· patent assignee history

1987Based in Blaine, MN, US· patent location history

1997Based in Eau Claire, WI, US· patent location history

2015Patents assigned to SUDA LTD (1)· patent assignee history

2015Based in Mendham, NJ, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HOWDEN ENVIRONMENTAL SYSTEMS	1	1987
SUDA LTD	1	2015

Locations

Location	Patents	Span
Mendham, New Jersey, US	1	2015
Eau Claire, WI, US	1	1997
Blaine, Minnesota, US	1	1987