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Class Information
Number: 33/388
Name: Geometrical instruments > Indicator of direction of force traversing natural media > Level or plumb, terrestrial gravitation responsive > Liquid type, upper surface utilizing > Bubble > Liquid container adjustable on reference-surface section > Adjustment indicium
Description: Device provided with means on the receptacle and the member for indicating the relative position of adjustment.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5791676 |
Trailer hook-up gauge for vertical hitch alignment |
Aug. 11, 1998 |
| 5421094 |
Adjustable level |
Jun. 6, 1995 |
| 5127167 |
Multi-function spirit-level |
Jul. 7, 1992 |
| 5063679 |
Protractor bubble level |
Nov. 12, 1991 |
| 5001838 |
Spirit level |
Mar. 26, 1991 |
| 4999921 |
Adjustable spirit level |
Mar. 19, 1991 |
| 4964219 |
Combination plumb/level instrument for a try square |
Oct. 23, 1990 |
| 4774767 |
Water level |
Oct. 4, 1988 |
| 4604812 |
Pitch-angle-checker (P-A-C) |
Aug. 12, 1986 |
| 4590682 |
Compact level |
May. 27, 1986 |
| 4335524 |
Spirit level |
Jun. 22, 1982 |
| 4320581 |
Leveling |
Mar. 23, 1982 |
| 4112585 |
Level indicating instrument |
Sep. 12, 1978 |
| 4073062 |
Level |
Feb. 14, 1978 |
| 3947970 |
Roll alignment gauge |
Apr. 6, 1976 |
| 3939571 |
Method and apparatus for aiming aircraft visual approach slope indicator |
Feb. 24, 1976 |
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