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Class Information
Number: 33/438
Name: Geometrical instruments > Straightedge type > Base attached > Universal parallelism arrangement
Description: Subject matter wherein the straightedge device is so attached to the base for movement that it may be set for movement in any one direction relative to the base and moved over all portions of the surface of the base in that direction.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5191715 |
Drafting head for a drafting machine |
Mar. 9, 1993 |
| 5142789 |
Head of universal parallel ruler |
Sep. 1, 1992 |
| 4837938 |
Scale balancing device in drawing machine |
Jun. 13, 1989 |
| 4785546 |
Lithographic production planning system |
Nov. 22, 1988 |
| 4738029 |
Numerically or manually controlled moving carriage drafting machine |
Apr. 19, 1988 |
| 4682822 |
Electronic carriage brake for a drawing machine |
Jul. 28, 1987 |
| 4625410 |
Computer-aided drawing or engraving device |
Dec. 2, 1986 |
| 4601107 |
Scale balancing device in universal parallel ruler device |
Jul. 22, 1986 |
| 4587742 |
Scale balancing device in universal parallel ruler device |
May. 13, 1986 |
| 4580351 |
Scale balancing device in universal parallel ruler device |
Apr. 8, 1986 |
| 4578872 |
Scale balancing device in universal parallel ruler device |
Apr. 1, 1986 |
| 4571846 |
Scale balancing device in universal parallel ruler device |
Feb. 25, 1986 |
| 4559715 |
Drafting machine |
Dec. 24, 1985 |
| 4527340 |
Holding and guiding device for traveling-carriage drafting machines |
Jul. 9, 1985 |
| 4520573 |
Guide rail for a drawing machine carriage |
Jun. 4, 1985 |
| 4495708 |
Drawing head for a drawing machine |
Jan. 29, 1985 |
| 4486958 |
Drawing head |
Dec. 11, 1984 |
| 4486957 |
Drawing machine carrriage |
Dec. 11, 1984 |
| 4486956 |
Control device for drawing instruments |
Dec. 11, 1984 |
| 4483081 |
Head supporting device for universal parallel ruler |
Nov. 20, 1984 |
| 4438569 |
Drafting machine |
Mar. 27, 1984 |
| 4430805 |
Rail type universal parallel ruler device |
Feb. 14, 1984 |
| 4430797 |
Plotting device |
Feb. 14, 1984 |
| 4386470 |
Drafting apparatus |
Jun. 7, 1983 |
| 4367589 |
Drafting machine head |
Jan. 11, 1983 |
| 4359825 |
Drafting machine attachment |
Nov. 23, 1982 |
| 4359824 |
Protractor unit for drawing-board |
Nov. 23, 1982 |
| 4334364 |
Adjustable straight edged device for use with drafting board |
Jun. 15, 1982 |
| 4333245 |
Head supporting device for universal parallel ruler |
Jun. 8, 1982 |
| 4327499 |
Drafting apparatus |
May. 4, 1982 |
| 4312132 |
Rail type universal parallel ruler device |
Jan. 26, 1982 |
| 4268969 |
Universal parallel ruler including scale setting device |
May. 26, 1981 |
| 4242804 |
Universal digital converter for drafting machines |
Jan. 6, 1981 |
| 4241512 |
Drawing apparatus |
Dec. 30, 1980 |
| 4221056 |
Universal parallel ruler with converted display of displacement |
Sep. 9, 1980 |
| 4151649 |
Universal parallel ruler device |
May. 1, 1979 |
| 4121343 |
Picture frame mat opening marker |
Oct. 24, 1978 |
| 4087916 |
Drawing table with a telescopic arm |
May. 9, 1978 |
| 4070758 |
Straightedge supporting device for rail type drawing instrument |
Jan. 31, 1978 |
| 4019258 |
Device for attaching rollers to a carriage adapted to move along a rail |
Apr. 26, 1977 |
| 3950853 |
Track type drafting machine |
Apr. 20, 1976 |
| 3949481 |
Layout instrument for sheet-material fabrication |
Apr. 13, 1976 |
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