Screen

Details Screen Screen

2011-07-05

2011-07-05

Mahoney, Christopher (Department: 2862)

Optical: systems and elements

Projection screen

C160S351000, C040S603000, C040S610000

Reexamination Certificate

active

07974004

ABSTRACT:
A screen includes: the four arm members have first connection sections, one at each of the first and second support section side extremities, each of the first and second support sections includes at either extremity thereof a second connection section which receives the first connection section, an attachment and detachment of each of the arm members to and from the screen main body is carried out by an attachment and detachment of the first connection section to and from the second connection section, each of the four arm members has a third connection section at the support rod side extremity, the support rod has fourth connection sections which receive, one each, the four arm members, and an attachment and detachment of the arm members to and from the support rod is carried out by the third connection sections and fourth connection sections coming into engagement.

REFERENCES:
patent: 4017152 (1977-04-01), Allen
patent: 4068673 (1978-01-01), Bernardi
patent: 4708189 (1987-11-01), Ward
patent: 5373863 (1994-12-01), Prizio
patent: 6928904 (2005-08-01), Hsien
patent: 2006/0077356 (2006-04-01), Merczak
patent: 64-49929 (1989-03-01), None
patent: 2003-315920 (2003-11-01), None

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