Inventor

Richard L. Zelinka

Inventor

Maplewood, MN, US

Overview

1987–1991

Patent span

Performing operations

Primary field (CPC B)

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

B01Dprimary

B01DSeparation50%

D01DMechanical methods or apparatus in the manufacture of artificial filaments, threads, fibres, bristles or ribbons25%

D04HMaking textile fabrics, e.g. from fibres or filamentary material25%

PatentTitleYear

Assembled from patent assignee/location history and declaration credentials.

1987–1991Patents assigned to DONALDSON CO INC (2)· patent assignee history

1987–1991Based in Maplewood, MN, US· patent location history

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
DONALDSON CO INC	2	1987–1991

Locations

Location	Patents	Span
Maplewood, Minnesota, US	2	1987–1991