LexDanaLexDanabeta
Inventor

Frank A. Janezich

Inventor
Richfield, MN, US

Overview

2→
Patents
1980–1981
Patent span
Performing operations
Primary field (CPC B)

Patents· 2 as inventor

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

B01Dprimary
B01DSeparation67%
F02MSupplying combustion engines in general with combustible mixtures or constituents thereof33%
PatentTitleYear
4,243,397'Air cleaner with replaceable filter element'19814,211,543'Air cleaner with replaceable filter element'1980

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1980–1981Patents assigned to DONALDSON CO INC (2)· patent assignee history
1980–1981Based in Richfield, MN, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
DONALDSON CO INC21980–1981
Locations
LocationPatentsSpan
Richfield, Minnesota, US21980–1981