Inventor
Roxann M. Bittner
Inventor
Royal Oak, MI, US
Overview
Patents· 10 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
F01Mprimary
F01MLubricating of machines or engines in general16%
F04CRotary-piston, or oscillating-piston, positive-displacement machines for liquids12%
Y10TTechnical subjects covered by former us classification12%
F01LCyclically operating valves for machines or engines8%
F02BInternal-combustion piston engines8%
F16HGearing8%
B22CFoundry moulding4%
F01CRotary-piston or oscillating-piston machines or engines4%
F01NGas-flow silencers or exhaust apparatus for machines or engines in general4%
F01PCooling of machines or engines in general4%
PatentTitleYear
9,982,580Adaptation of a wireless oil level sensor to an oil pan drain plug20189,739,348'Variable tensioner for cam drive'20178,875,933'Drainable container system'20148,490,595'Fastening system'20138,371,260'Cylinder head drain and vent'20138,166,938'Engine camshaft cover with integrated oil passages for camshaft phaser actuation'20128,113,183'Engine and supercharger with liquid cooled housings'20127,993,118'Liquid-cooled rotor assembly for a supercharger'20117,726,286'Housing for a supercharger assembly'20106,874,486'Supercharger with multiple backflow ports for noise control'2005Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2005–2013Based in Royal Oak, MI, US· patent location history
2010–2014Patents assigned to GM GLOBAL TECH OPERATIONS INC (7)· patent assignee history
2012–2014Patents assigned to BITTNER ROXANN M (5)· patent assignee history
2012–2018Based in Bloomfield Hills, MI, US· patent location history
2013–2014Patents assigned to GRIFFITHS LEONARD BARRY (2)· patent assignee history
2013Patents assigned to BAKER RODNEY E (1)· patent assignee history
2014Based in Rochester Hills, MI, US· patent location history
2017–2018Patents assigned to GM GLOBAL TECH OPERATIONS LLC (2)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| GM GLOBAL TECH OPERATIONS INC | 7 | 2010–2014 |
| BITTNER ROXANN Mself | 5 | 2012–2014 |
| GM GLOBAL TECH OPERATIONS LLC | 2 | 2017–2018 |
| GRIFFITHS LEONARD BARRY | 2 | 2013–2014 |
| BAKER RODNEY E | 1 | 2013 |
Locations
| Location | Patents | Span |
|---|---|---|
| Royal Oak, MI, US | 5 | 2005–2013 |
| Bloomfield Hills, MI, US | 4 | 2012–2018 |
| Rochester Hills, MI, US | 1 | 2014 |