-
-
-
Ellipsograph
-
Patent number 6,308,426
-
Issue date Oct 30, 2001
-
Hyoun-Gyu Lim
-
B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
-
Powered toy hand drawing device
-
Patent number 5,933,970
-
Issue date Aug 10, 1999
-
4Kidz, Inc.
-
James Diresta
-
B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
-
Conic section compass
-
Patent number 5,870,830
-
Issue date Feb 16, 1999
-
Yen-Hung Wu
-
B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
-
-
Device for drawing ellipses
-
Patent number 4,567,662
-
Issue date Feb 4, 1986
-
Peter Wallner
-
B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
-
Ellipse compass
-
Patent number 4,204,327
-
Issue date May 27, 1980
-
Naguib F. Danial
-
B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
-
Ellipsograph
-
Patent number 4,169,315
-
Issue date Oct 2, 1979
-
Lin Sin
-
B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
-
-
Ellipse drawing instrument
-
Patent number 4,010,546
-
Issue date Mar 8, 1977
-
Pi Ching-Tien
-
B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
-
3719996
-
Patent number 3,719,996
-
Issue date Mar 13, 1973
-
B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
-
3521361
-
Patent number 3,521,361
-
Issue date Jul 21, 1970
-
B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
-
3469319
-
Patent number 3,469,319
-
Issue date Sep 30, 1969
-
B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
-
3461564
-
Patent number 3,461,564
-
Issue date Aug 19, 1969
-
B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
-
3137945
-
Patent number 3,137,945
-
Issue date Jun 23, 1964
-
B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
-
3104466
-
Patent number 3,104,466
-
Issue date Sep 24, 1963
-
B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
-
3085341
-
Patent number 3,085,341
-
Issue date Apr 16, 1963
-
B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
-
3084441
-
Patent number 3,084,441
-
Issue date Apr 9, 1963
-
B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
-
3065544
-
Patent number 3,065,544
-
Issue date Nov 27, 1962
-
B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
-
3016611
-
Patent number 3,016,611
-
Issue date Jan 16, 1962
-
B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
-
2899748
-
Patent number 2,899,748
-
Issue date Aug 18, 1959
-
B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
-
2725634
-
Patent number 2,725,634
-
Issue date Dec 6, 1955
-
B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
-
2707831
-
Patent number 2,707,831
-
Issue date May 10, 1955
-
B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
-
2690013
-
Patent number 2,690,013
-
Issue date Sep 28, 1954
-
B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
-
2645854
-
Patent number 2,645,854
-
Issue date Jul 21, 1953
-
B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
-
2636272
-
Patent number 2,636,272
-
Issue date Apr 28, 1953
-
B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
-
2632953
-
Patent number 2,632,953
-
Issue date Mar 31, 1953
-
B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
-
2577905
-
Patent number 2,577,905
-
Issue date Dec 11, 1951
-
B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
-
2498798
-
Patent number 2,498,798
-
Issue date Feb 28, 1950
-
B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES