| |
 |
|
Class Information
Number: 33/294
Name: Geometrical instruments > Straight-line light ray type > Rod or target > Self computing type rod
Description: Device wherein the rod includes means permitting the difference in elevation between the two points to be read directly from the rod without computation.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7373725 |
Surveying systems and methods for detecting and measuring changes in elevation |
May. 20, 2008 |
| 7251899 |
Prism pole |
Aug. 7, 2007 |
| 6182372 |
Interpolation using digital means for range findings in a total station |
Feb. 6, 2001 |
| 6167629 |
Electronic level and a leveling rod for use in combination with the same |
Jan. 2, 2001 |
| 6161295 |
Brake mechanism for computerized grade rod |
Dec. 19, 2000 |
| 6131296 |
Method and device for determining positions of objects |
Oct. 17, 2000 |
| 6085452 |
Method and apparatus for marking a location |
Jul. 11, 2000 |
| 6076267 |
Leveling pole |
Jun. 20, 2000 |
| 5983511 |
Apparatus for displaying an appropriate height |
Nov. 16, 1999 |
| 5894344 |
Elevation Measurement apparatus |
Apr. 13, 1999 |
| 5551159 |
Scalable measuring apparatus and displacement display device, system and method |
Sep. 3, 1996 |
| 5457890 |
Scalable measuring apparatus and displacement display device, system and method |
Oct. 17, 1995 |
| 5402223 |
Electronic survey stadia |
Mar. 28, 1995 |
| 5313409 |
Arrangement for performing position determination |
May. 17, 1994 |
| 5272814 |
Device for defining a horizontal plane |
Dec. 28, 1993 |
| 5189484 |
Laser beam detector for grade elevation measurement |
Feb. 23, 1993 |
| 5087125 |
Equipment for measuring a difference in elevation |
Feb. 11, 1992 |
| 4820041 |
Position sensing system for surveying and grading |
Apr. 11, 1989 |
| 4730920 |
Optoelectronic stadia |
Mar. 15, 1988 |
| 4673287 |
Laser-optical surveying system |
Jun. 16, 1987 |
| 4653910 |
Remote indicator for a laser alignment system |
Mar. 31, 1987 |
| 4471532 |
Direct reading grade rod with a sliding scale |
Sep. 18, 1984 |
| 4345382 |
Contractor's grade rod apparatus and procedure for setting and checking grades |
Aug. 24, 1982 |
| 4271598 |
Surveying staffs |
Jun. 9, 1981 |
| 4030832 |
Automatic grade rod and method of operation |
Jun. 21, 1977 |
| 4029415 |
Laser land-surveying apparatus with digital display |
Jun. 14, 1977 |
|
|
|
