US PATENT SUBCLASS 70 / 91
.~.~ Door

Current as of: June, 1999
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70 /   HD   LOCKS

57  DF  SPECIAL APPLICATION {7}
77  DF  .~ For closures {5}
91.~.~ Door {5}
92  DF  .~.~.~> Emergency exit
93  DF  .~.~.~> Links to limit opening
94  DF  .~.~.~> Braces
95  DF  .~.~.~> Sliding door {3}
101  DF  .~.~.~> Swinging door {4}

DEFINITION

Classification: 70/91

(under subclass 77) Devices applied to doors, generally of substantial construction, such as are normally used in houses, buildings, and vehicular constructions of fairly large proportions.

SEE OR SEARCH THIS CLASS, SUBCLASS:

78+, for cabinet door locks.