Inventor
Mark Alan Hartfield
Inventor
St. Joseph, MI, US
Overview
Patents· 9 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H05Bprimary
H05BElectric heating89%
G01NInvestigating or analysing materials by determining their chemical or physical properties11%
PatentTitleYear
7,368,916'Apparatus and methods for making capacitive measurements of cathode fall in fluorescent lamps'20087,339,322'Apparatus and methods for making spectroscopic measurements of cathode fall in fluorescent lamps'20087,323,877'Apparatus and methods for making spectroscopic measurements of cathode fall in fluorescent lamps'20087,259,519'Apparatus and methods for making capacitive measurements of cathode fall in fluorescent lamps'20077,224,124'Apparatus and methods for making capacitive measurements of cathode fall in fluorescent lamps'20077,196,476'Apparatus and methods for making capacitive measurements of cathode fall in fluorescent lamps'20077,116,055'Apparatus and methods for making spectroscopic measurements of cathode fall in fluorescent lamps'20067,070,738'Analyzer with variable volume ballast chamber and method of analysis'20067,002,301'Apparatus and methods for making capacitive measurements of cathode fall in fluorescent lamps'2006Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2006–2008Patents assigned to LUTRON ELECTRONICS CO (8)· patent assignee history
2006Patents assigned to LECO CORP (1)· patent assignee history
2006–2008Based in St. Joseph, MI, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| LUTRON ELECTRONICS CO | 8 | 2006–2008 |
| LECO CORP | 1 | 2006 |
Locations
| Location | Patents | Span |
|---|---|---|
| St. Joseph, MI, US | 9 | 2006–2008 |