Inventor
Charles M. Wetzel
Inventor
Lititz, PA, US
Overview
Patents· 11 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H01Jprimary
H01JElectric discharge tubes or discharge lamps35%
G03FPhotomechanical production of textured or patterned surfaces, e.g. for printing, for processing of semiconductor devices15%
C23FNon-mechanical removal of metallic material from surface12%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests12%
G03GElectrography8%
B05BSpraying apparatus4%
G01NInvestigating or analysing materials by determining their chemical or physical properties4%
G03BApparatus or arrangements for taking photographs or for projecting or viewing them4%
G03CPhotosensitive materials for photographic purposes4%
H01BCables4%
PatentTitleYear
6,562,249'Method utilizing a magnetic assembly during etching thin shadow masks'20035,730,887'Display apparatus having enhanced resolution shadow mask and method of making same'19985,477,285'CRT developing apparatus'19955,474,867'Method of manufacturing a luminescent screen for a CRT under ambient controls'19955,156,770'Conductive contact patch for a CRT faceplate panel'19925,151,337'Method of electrophotographically manufacturing a luminescent screen for a color CRT having a conductive contact patch'19924,765,743'Method of inspecting a master member'19884,669,871'Photographic printing plate and method of exposing a coated sheet using same'19874,664,996'Method for etching a flat apertured mask for use in a cathode-ray tube'19874,656,107'Photographic printing plate for use in a vacuum printing frame'19874,588,676'Photoexposing a photoresist-coated sheet in a vacuum printing frame'1986Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1986–1987Patents assigned to RCA CORP (4)· patent assignee history
1986–2003Based in Lititz, PA, US· patent location history
1987Based in Warwick Township, Lancaster County, PA, US· patent location history
1988Patents assigned to RCA LICENSING CORP (1)· patent assignee history
1992–2003Patents assigned to THOMSON CONSUMER ELECTRONICS (5)· patent assignee history
1992Patents assigned to RCA THOMSON LICENSING CORP (1)· patent assignee history
2003Patents assigned to BMC IND INC (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| THOMSON CONSUMER ELECTRONICS | 5 | 1992–2003 |
| RCA CORP | 4 | 1986–1987 |
| BMC IND INC | 1 | 2003 |
| RCA LICENSING CORP | 1 | 1988 |
| RCA THOMSON LICENSING CORP | 1 | 1992 |
Locations
| Location | Patents | Span |
|---|---|---|
| Lititz, Pennsylvania, US | 10 | 1986–2003 |
| Warwick Township, Lancaster County, Pennsylvania, US | 1 | 1987 |