Armstrong, Nikaido & Marmelstein
Test tube assembly
 A test tube assembly adapted to use for blood test comprising a holding tube, a test tube having a leg extending downwardly, the test tube being disposed in the holding tube and a foot of the leg being in touch with the bottom wall of the holding tube and, a cylindrical spacer disposed between the holding tube and the test tube at the upper part thereof to hold the latter within the holding tube. 
Japan Medical Supply Co., Ltd.
B B
B01L B01L
inventional inventional
Motoji
Kurata