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Class Information
Number: 400/176
Name: Typewriting machines > Having fluid-pressure power drive
Description: Subject matter wherein a typewriter or a portion thereof is caused to operate by energy that is derived from or transmitted via the exertion of force upon a fluid (i.e., a flowable material).
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6666626 |
System for transporting sliders for zipper bags |
Dec. 23, 2003 |
| 6056455 |
Programmable print head and multi-level encoding of print head data |
May. 2, 2000 |
| 4613241 |
Printing mechanism for dot matrix printers |
Sep. 23, 1986 |
| 4572680 |
Stamping apparatus for providing workpieces with different embossed marks |
Feb. 25, 1986 |
| 4326656 |
Evacuated printing platen |
Apr. 27, 1982 |
| 4160410 |
Marking device utilizing dual rod power cylinder |
Jul. 10, 1979 |
| 4128345 |
Fluid impulse matrix printer |
Dec. 5, 1978 |
| 4027762 |
Dot printer |
Jun. 7, 1977 |
| 4000803 |
Vacuum-buffered bidirectional paper drive system |
Jan. 4, 1977 |
| 3978966 |
Tabulation operation sensing unit for automatic typewriter |
Sep. 7, 1976 |
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