Inventor

Kenneth A. Aho

Inventor

Chisago City, MN, US

Overview

11→

Patents

1978–1995

Patent span

Mechanical engineering

Primary field (CPC F)

Patents· 11 as inventor

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

F21Sprimary

F21SNon-portable lighting devices24%

F21VFunctional features or details of lighting devices or systems thereof24%

G02BOptical elements, systems or apparatus20%

B65DContainers for storage or transport of articles or materials, e.g. bags, barrels, bottles, boxes, cans, cartons, crates, drums, jars, tanks, hoppers, forwarding containers8%

G09FDisplaying8%

A01NPreservation of bodies of humans or animals or plants or parts thereof4%

E01FAdditional work, such as equipping roads or the construction of platforms, helicopter landing stages, signs, snow fences, or the like4%

F21YIndexing scheme associated with subclasses f21k, f21l, f21s and f21v, relating to the form or the kind of the light sources or of the colour of the light emitted4%

G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein4%

PatentTitleYear

5,471,348'Directed reflection optical device'1995 5,190,370'High aspect ratio lighting element'1993 5,130,848'Passive railroad crossing warning system'1992 5,097,395'Multiple cavity light fixture'1992 5,029,060'Uniform intensity profile catadioptric lens'1991 4,874,228'Back-lit display'1989 4,799,131'Automotive lighting element'1989 4,799,137'Reflective film'1989 4,789,921'Cone shaped Fresnel reflector'1988 4,253,773'Fluid container'1981 4,130,198'Multi-part liquid container'1978

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1978–1995Patents assigned to MINNESOTA MINING & MFG (11)· patent assignee history

1978Based in Roseville, MN, US· patent location history

1981–1995Based in Chisago City, MN, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
MINNESOTA MINING & MFG	11	1978–1995

Locations

Location	Patents	Span
Chisago City, Minnesota, US	10	1981–1995
Roseville, Minnesota, US	1	1978