On 5/27/2009 7:37 PM Peter spake thus:

The only markings on mine are stamped in the wood. They say,

"5x7 EASTMAN FILM U.S. PAT. 2056144 1641420"

(MADE?) "IN U.S.A. BY FOLMER GRAFLEX CORP. FOR EASTMAN KODAK COMPANY"

The upper part has a metal piece on each side affixed to the wood with
four screws.

Interesting; one of the holders I got in that motley collection says
(stamped in the wood)

5X7 EASTKO FILM HOLDER (on top)
MADE IN U.S.A BY FOLMER GRAFLEX CORP. FOR EASTMAN KODAK COMPANY (on
bottom)

No patent #s, and no metal pieces for the dark slide holders.

There seem to be endless variations of these devices.


--
Found--the gene that causes belief in genetic determinism