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Class Information
Number: 33/719
Name: Geometrical instruments > Distance measuring > Sounding type > Depth indication
Description: Subject matter having means to measure the distance from the top of a surface to the bottom.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6481110 |
Plumb bob |
Nov. 19, 2002 |
| 5546672 |
Magnetic mark detection |
Aug. 20, 1996 |
| 5528938 |
Method and apparatus for measuring length of conduit and for diagnosing inside of conduit |
Jun. 25, 1996 |
| 5505086 |
Method and apparatus for measuring length of conduit and for diagnosing inside of conduit |
Apr. 9, 1996 |
| 5503341 |
Fishline length measurement device |
Apr. 2, 1996 |
| 5479724 |
Method and apparatus for scour depth measurement |
Jan. 2, 1996 |
| 5448914 |
System for measuring the penetration depth of an elongated object into the ground |
Sep. 12, 1995 |
| 5427323 |
Fishline length measurement device |
Jun. 27, 1995 |
| 5365674 |
Device for measuring the displacement of a swivel of a drilling mast |
Nov. 22, 1994 |
| 5363565 |
Fishing line length measuring device for fishing reels |
Nov. 15, 1994 |
| 5351414 |
Water depth apparatus |
Oct. 4, 1994 |
| 5351531 |
Depth measurement of slickline |
Oct. 4, 1994 |
| 5286972 |
Photoelectric line measuring device with digital display |
Feb. 15, 1994 |
| 5243128 |
Sewer cleaning apparatus |
Sep. 7, 1993 |
| 5191719 |
Depth gauge for a fishing line |
Mar. 9, 1993 |
| 5187878 |
Angular depth gauge |
Feb. 23, 1993 |
| 5131165 |
Computerized depth calculator |
Jul. 21, 1992 |
| 5115574 |
Method and apparatus for measuring rise in height of a liquid column |
May. 26, 1992 |
| 5031452 |
Water level probe |
Jul. 16, 1991 |
| 5012589 |
Displacement servo gauge |
May. 7, 1991 |
| 4910878 |
Suspended-cable apparatus for measuring level of material in a storage vessel |
Mar. 27, 1990 |
| 4907347 |
Swivel head counter |
Mar. 13, 1990 |
| 4860631 |
Outer tubular envelope for inserting apparatus |
Aug. 29, 1989 |
| 4787244 |
Well pipe or object depth indicator |
Nov. 29, 1988 |
| 4620371 |
Water-depth measuring apparatus for a double bearing type fishing reel |
Nov. 4, 1986 |
| 4597183 |
Methods and apparatus for measuring a length of cable suspending a well logging tool in a borehole |
Jul. 1, 1986 |
| 4461015 |
Digital depth indicator for earth drilling apparatus |
Jul. 17, 1984 |
| 4321751 |
Depth measurements |
Mar. 30, 1982 |
| 4077076 |
Anchor light |
Mar. 7, 1978 |
| 3978588 |
Magnetic wire line marking, erasing and detecting method and apparatus |
Sep. 7, 1976 |
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