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Inventor

David Dahl

Inventor
Jackson, TN, US

Overview

6→
Patents
1977–2020
Patent span
Mechanical engineering
Primary field (CPC F)

Patents· 6 as inventor

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

F04Dprimary
F04DNon-positive-displacement pumps20%
F05DIndexing scheme for aspects relating to non-positive-displacement machines or engines, gas-turbines or jet-propulsion plants20%
F24CDomestic stoves or ranges20%
LOC1220%
G01SRadio direction-finding10%
H02HEmergency protective circuit arrangements10%
PatentTitleYear
D0882499Tire tread2020D0793951'Tire tread'20177,894,169'High resistance ground protection employing AC drive characteristics'20116,050,258'Exhaust fan with dry lubricant coating'20005,809,993'Exhaust fan with dry lubricant coating'19984,053,881'Mobile radar apparatus'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977Patents assigned to LEHMKUHL AS (1)· patent assignee history
1977Based in Ski, NO· patent location history
1998–2000Patents assigned to GREENHECK FAN CORP (2)· patent assignee history
1998–2000Based in Merril, WI, US· patent location history
2011Patents assigned to ROCKWELL AUTOMATION TECH INC (1)· patent assignee history
2011Based in Cedarburg, WI, US· patent location history
2017–2020Patents assigned to THE CARLSTAR GROUP LLC (2)· patent assignee history
2017–2020Based in Jackson, TN, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
GREENHECK FAN CORP21998–2000
THE CARLSTAR GROUP LLC22017–2020
LEHMKUHL AS11977
ROCKWELL AUTOMATION TECH INC12011
Locations
LocationPatentsSpan
Jackson, TN, US22017–2020
Merril, WI, US21998–2000
Cedarburg, WI, US12011
Ski, NO11977