US PATENT SUBCLASS 52 / 567
.~.~ Internal lock-head on header unit

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

561  DF  LATERALLY RELATED, INDIVIDUALLY ASSEMBLED COURSES {4}
566  DF  .~ Header unit traverses course {1}
567.~.~ Internal lock-head on header unit

DEFINITION

Classification: 52/567

(under subclass 566) Structure wherein the transverse unit has a head portion which is within the outside faces of the courses, which portion is locked to a mating configuration formed by the course modules or formed integral with a module of a course.