A telescopic adjustable positioning device comprises an outer sleeve; a telescopic tube receiving into the outer sleeve at one end thereof and having a plurality of positioning holes; a retaining seat being a hollow tube and enclosing a connection of the outer sleeve and the telescopic tube; one side...http://www.google.ca/patents/US7980519?utm_source=gb-gplus-sharePatent US7980519 - Telescopic adjustable positioning device
