Here's a couple Sliding Openers

RETRACTABLE OR SLIDE-OUT OPENER, CALLED "PRESTOPENER".
MADE BY THE ELECTRO-CHEMICAL ENGRAVING CO. INC. OF NEW YORK.
OPENERS ARE STEEL, CASE IS PLATED & PAINTED BRASS.
COLORS: BLACK,BLUE,GREEN,RED,YELLOW
Closed these openers are 2 1/2", open 3 1/4".
Pic # 1,(closed, front) & #2, (open, back). Edelweiss Beer, a product of Peter Hand Brewing, Chicago, IL. [1899 to 1978] (JFO # M-3-5)
Pic # 3, (closed, front) & #4, (open, back). S & K Lager Beer, a product of Schorr-Kolkschneider Brewing Co, St.Louis, MO. [1901 to 1939] (JFO # M-3-17)
I don't know a patten date or age on these, but I believe there from the 30's, after prohibition.
Enjoy them,
Lumpy