US PATENT SUBCLASS 52 / 745.15
.~ Portal or closure construction

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

741.1  DF  PROCESSES {14}
745.15.~ Portal or closure construction {1}
745.16  DF  .~.~> Using prefabricated unit

DEFINITION

Classification: 52/745.15

Portal or closure construction:

(under subclass 741.1) Subject matter wherein the process comprises a method of construction of (a) an opening in a barrier or (b) an adjunct thereto.