US PATENT SUBCLASS 52 / 571
.~.~.~ Additional lock means between projections

Current as of: June, 1999
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52 /   HD   STATIC STRUCTURES (E.G., BUILDINGS)

561  DF  LATERALLY RELATED, INDIVIDUALLY ASSEMBLED COURSES {4}
569  DF  .~ Opposed lateral monolithic projections on modules {2}
570  DF  .~.~ Locking type; i.e., against lateral separation {1}
571.~.~.~ Additional lock means between projections

DEFINITION

Classification: 52/571

(under subclass 570) Structure including discrete additional means acting between the opposed mutually engaging projections and holding them fixed relative to each other.