David Alan Friedersdorff
Engineering at Waketon Rd, Lewisville, TX
License number
Louisiana EI.0011393
Issued Date
Jan 1, 1900
Category
Civil Engineer
Address
Address
3400 Waketon Rd, Lewisville, TX 75028
Professional information
Dual In Focus Gobo
US Patent:
2011017, Jul 14, 2011
Filed:
Jan 12, 2010
Appl. No.:
12/686308
Inventors:
Russel B. Mahaffey - Highland Village TX, US
Breck M. Outland - Dallas TX, US
David A. Friedersdorff - Flower Mound TX, US
Breck M. Outland - Dallas TX, US
David A. Friedersdorff - Flower Mound TX, US
Assignee:
PRODUCTION RESOURCE GROUP L.L.C - New Windsor NY
International Classification:
F21S 10/00, F21V 17/02, G03B 21/14
US Classification:
353 62, 362322, 353121
Abstract:
A gobo holder with two gobos that are rotatable one relative to the other. The gobos are located with their patterned surfaces facing one another and very close to one another so that both can be in focus at the same time.