RICHARD MATTHEW SEMAN
Pilots at Frst Dr, Pittsburgh, PA
License number
Pennsylvania A4311476
Issued Date
Jan 2016
Expiration Date
Jan 2018
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
2320 Forest Dr, Pittsburgh, PA 15235
Professional information
Duplex Ring Binder
US Patent:
2008030, Dec 11, 2008
Filed:
Jun 4, 2008
Appl. No.:
12/156693
Inventors:
Richard M. Seman - Pittsburgh PA, US
International Classification:
B42F 13/00, B42F 13/20, B42F 3/04
US Classification:
402 74, 281 45, 402 70, 281 29
Abstract:
A duplex binder assembly is provided that is comprised of two oppositely facing binders that share a common back cover. In this way, a symmetry is created which is lacking in known designs, which promotes more complimentary vertical storage with typical companion materials such as books.