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Class Information
Number: 33/716
Name: Geometrical instruments > Distance measuring > Sounding type > Including electrical signal means
Description: Subject matter having an electric circuit which is actuated when a fluid is contacted resulting in a visual or audible signal.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6508120 |
Fluid level monitor with at least partially submersible buoyant element |
Jan. 21, 2003 |
| 5546672 |
Magnetic mark detection |
Aug. 20, 1996 |
| 5395065 |
Fishline length measuring device for fishing reel |
Mar. 7, 1995 |
| 5363565 |
Fishing line length measuring device for fishing reels |
Nov. 15, 1994 |
| 5309647 |
Fiber optic cable footage indicator |
May. 10, 1994 |
| 5243860 |
Liquid level measurement |
Sep. 14, 1993 |
| 5243128 |
Sewer cleaning apparatus |
Sep. 7, 1993 |
| 5166589 |
Level probe for a shaft furnace |
Nov. 24, 1992 |
| 5131165 |
Computerized depth calculator |
Jul. 21, 1992 |
| 5058288 |
Plumb bob device for determining the bed height of bulk material in a shaft furnace |
Oct. 22, 1991 |
| 4697758 |
Fishing reel with microcomputer |
Oct. 6, 1987 |
| 4326337 |
Measuring instrument for the profile of piled charge of a blast furnace |
Apr. 27, 1982 |
| 4279078 |
Fluid presence detector |
Jul. 21, 1981 |
| 4244219 |
Liquid-level meter |
Jan. 13, 1981 |
| 4219133 |
Storage level monitor |
Aug. 26, 1980 |
| 4155167 |
Dipstick guide |
May. 22, 1979 |
| 4123753 |
Ullage measuring device |
Oct. 31, 1978 |
| 4052612 |
Analog-to-digital encoder unit employing a pre-encoded film with improved film tensioning means |
Oct. 4, 1977 |
| 4026151 |
Measuring device for water flow in a buried pipe |
May. 31, 1977 |
| 3975633 |
Analog to digital encoder unit employing a pre-encoded film |
Aug. 17, 1976 |
| 3935741 |
Level sensor |
Feb. 3, 1976 |
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