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Inventor

John M. Buettner

Inventor
Stillwater, MN, US

Overview

2→
Patents
1977–2004
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
B01DSeparation20%
B82YSpecific uses or applications of nanostructures20%
D01FChemical features in the manufacture of artificial filaments, threads, fibres, bristles or ribbons20%
H04RLoudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers20%
Y10TTechnical subjects covered by former us classification20%
PatentTitleYear
6,740,142'Industrial bag house elements'20044,051,919'High fidelity speaker enclosure'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977Patents assigned to BUETTNER JOHN M (1)· patent assignee history
1977Based in Willoughby Hills, OH, US· patent location history
2004Patents assigned to DONALDSON CO INC (1)· patent assignee history
2004Based in Stillwater, MN, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
BUETTNER JOHN Mself11977
DONALDSON CO INC12004
Locations
LocationPatentsSpan
Stillwater, Minnesota, US12004
Willoughby Hills, OH, US11977