Inventor
David M. Mathis
Inventor
Phoenix, AZ, US
Overview
Patents· 12 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
F02Cprimary
F02CGas-turbine plants17%
F01DNon-positive displacement machines or engines, e.g. steam turbines10%
B01LChemical or physical laboratory apparatus for general use7%
C12MApparatus for enzymology or microbiology7%
F16CShafts7%
F16JPistons7%
G01NInvestigating or analysing materials by determining their chemical or physical properties7%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests7%
Y10TTechnical subjects covered by former us classification7%
B63GOffensive or defensive arrangements on vessels3%
PatentTitleYear
7,491,127'Spline with lubricant retention feature for use in torque limiter'20097,413,418'Fluidic compressor'20087,367,427'Accessory lubrication system for a turbine plant'20087,251,550'Aircraft accessory monitor'20077,232,289'Shroud for an air turbine starter'20077,186,081'Air turbine starter enhancement for clearance seal utilization'20077,033,134'Air turbine starter having a force balanced, pressure energized, weighted check valve'20065,636,848'Oil seal for a high speed rotating shaft'19975,574,246'Underwater vehicle with improved jet pump propulsion configuration'19965,425,915'Culturette safety sleeve'19955,256,537'Culturette safety sleeve'19935,131,231'Method for operating a closed Brayton engine and engine adapted for use with method'1992Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1992–1997Patents assigned to ALLIED SIGNAL INC (3)· patent assignee history
1992–2009Based in Phoenix, AZ, US· patent location history
1993–1995Patents assigned to BECTON DICKINSON CO (2)· patent assignee history
1993–1995Based in El Paso, TX, US· patent location history
2006–2009Patents assigned to HONEYWELL INT INC (7)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HONEYWELL INT INC | 7 | 2006–2009 |
| ALLIED SIGNAL INC | 3 | 1992–1997 |
| BECTON DICKINSON CO | 2 | 1993–1995 |
Locations
| Location | Patents | Span |
|---|---|---|
| Phoenix, AZ, US | 10 | 1992–2009 |
| El Paso, Texas, US | 2 | 1993–1995 |