Inventor
Charles J. Kuehmann
Inventor
Deerfield, IL, US
Overview
Patents· 17 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C22Cprimary
C22CAlloys30%
C21DModifying the physical structure of ferrous metals24%
F16HGearing17%
B22FWorking metallic powder7%
C22FChanging the physical structure of non-ferrous metals and non-ferrous alloys4%
H01QAntennas, i.e. radio aerials4%
B23KSoldering or unsoldering2%
B32BLayered products, i.e. products built-up of strata of flat or non-flat, e.g. cellular or honeycomb, form2%
C23CCoating metallic material2%
H01BCables2%
PatentTitleYear
11,028,468Soft magnetic alloy optimized for metal injection molding202110,844,464Niobium metal alloy202010,597,762Aluminum alloys with high strength and cosmetic appeal202010,427,380Methods of manufacturing corrosion resistant bimetal parts and bimetal parts formed therefrom20199,627,749'Radio-frequency transparent window'20179,300,036'Radio-frequency transparent window'20167,967,927'Nanocarbide precipitation strengthened ultrahigh-strength, corrosion resistant, structural steels'20117,235,212'Nanocarbide precipitation strengthened ultrahigh strength, corrosion resistant, structural steels and method of making said steels'20077,160,399'Nanocarbide precipitation strengthened ultrahigh-strength, corrosion resistant, structural steels'20076,695,930'Process for case hardened dies in improving die life'20046,635,126'Advanced case carburizing secondary hardening steels'20036,491,767'Case hardened dies for improved die life'20026,485,582'Advanced case carburizing secondary hardening steels'20026,464,801'Advanced case carburizing secondary hardening steels'20026,458,220'Case hardened steel blades for sports equipment and method of manufacture'20026,379,475'Case hardened dies for improved die life'20026,176,946'Advanced case carburizing secondary hardening steels'2001Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2001–2004Patents assigned to UNIV NORTHWESTERN (7)· patent assignee history
2001–2011Based in Deerfield, IL, US· patent location history
2002Patents assigned to NORTHWESTERN UNIVERSITY BUSINE (1)· patent assignee history
2007–2011Patents assigned to QUESTEK INNOVATIONS LLC (2)· patent assignee history
2007Patents assigned to QUES TEK INNOVATIONS LLC (1)· patent assignee history
2016–2021Patents assigned to APPLE INC (5)· patent assignee history
2016–2020Based in Los Gatos, CA, US· patent location history
2020Based in Hawthorne, CA, US· patent location history
2021Based in Rolling Hills Estates, CA, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| UNIV NORTHWESTERN | 7 | 2001–2004 |
| APPLE INC | 5 | 2016–2021 |
| QUESTEK INNOVATIONS LLC | 2 | 2007–2011 |
| NORTHWESTERN UNIVERSITY BUSINE | 1 | 2002 |
| QUES TEK INNOVATIONS LLC | 1 | 2007 |
Locations
| Location | Patents | Span |
|---|---|---|
| Deerfield, Illinois, US | 11 | 2001–2011 |
| Los Gatos, California, US | 4 | 2016–2020 |
| Rolling Hills Estates, California, US | 1 | 2021 |
| Hawthorne, California, US | 1 | 2020 |