US PATENT SUBCLASS 123 / 54.6
.~.~.~ Six cylinder

Current as of: June, 1999
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123 /   HD   INTERNAL-COMBUSTION ENGINES

52.1  DF  MULTIPLE CYLINDER {7}
54.1  DF  .~ Cylinders radiating {4}
54.4  DF  .~.~ "V" type {2}
54.6.~.~.~ Six cylinder {1}
54.7  DF  .~.~.~.~> Eight cylinder {1}

DEFINITION

Classification: 123/54.6

Six cylinder:

(under subclass 54.4) Multiple cylinder engine including six or more cylinders.