Inventor
Ronald H. Birkhahn
Inventor
Toledo, OH, US
Overview
Patents· 9 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H10Dprimary
H10DInorganic electric semiconductor devices20%
C07CAcyclic or carbocyclic compounds15%
H10PGeneric processes or apparatus for the manufacture or treatment of devices covered by class h1015%
A61KPreparations for medical, dental or toiletry purposes10%
H01LSemiconductor devices10%
H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light10%
H10HInorganic light-emitting semiconductor devices having potential barriers10%
A23LFoods, foodstuffs or non-alcoholic beverages, not otherwise provided for5%
A23VIndexing scheme relating to foods, foodstuffs or non-alcoholic beverages and lactic or propionic acid bacteria used in foodstuffs or food preparation5%
PatentTitleYear
9,741,841'Group III-V semiconductor device with strain-relieving layers'20179,318,560'Group III-V device with strain-relieving layers'20168,575,660'Group III-V semiconductor device with strain-relieving interlayers'20138,269,253'Rare earth enhanced high electron mobility transistor and method for fabricating same'20126,406,930'Fabrication of visible light emitting device formed from wide band gap semiconductor doped with a rare earth element'20026,255,669'Visible light emitting device formed from wide band gap semiconductor doped with a rare earth element'20015,693,850'Nutritive water soluble glycerol esters of hydroxy butyric acid'19975,519,161'Nutritive glycerol esters of .beta.-acyloxy butyrates'19965,420,335'Parenteral nutrients based on watersoluble glycerol bisacetoacetates'1995Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1995–1997Based in Toledo, OH, US· patent location history
2001–2002Patents assigned to UNIV CINCINNATI (2)· patent assignee history
2001–2002Based in Cincinnati, OH, US· patent location history
2012–2016Patents assigned to INT RECTIFIER CORP (3)· patent assignee history
2012Patents assigned to BIRKHAHN RONALD H (1)· patent assignee history
2012–2013Based in Minneapolis, MN, US· patent location history
2013Patents assigned to BIRKHAHN RONALD (1)· patent assignee history
2016–2017Patents assigned to INFINEON TECHNOLOGIES AMERICAS CORP (2)· patent assignee history
2016–2017Based in Dublin, CA, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| INT RECTIFIER CORP | 3 | 2012–2016 |
| INFINEON TECHNOLOGIES AMERICAS CORP | 2 | 2016–2017 |
| UNIV CINCINNATI | 2 | 2001–2002 |
| BIRKHAHN RONALDself | 1 | 2013 |
| BIRKHAHN RONALD Hself | 1 | 2012 |
Locations
| Location | Patents | Span |
|---|---|---|
| Toledo, OH, US | 3 | 1995–1997 |
| Dublin, California, US | 2 | 2016–2017 |
| Minneapolis, Minnesota, US | 2 | 2012–2013 |
| Cincinnati, OH, US | 2 | 2001–2002 |