Patents
Patents for B43L 13 - Drawing instruments, or writing or drawing appliances or accessories, not otherwise provided for (6,769)
10/1978
10/17/1978US4121299 Constant velocity vector generator employing absolute value amplifier circuits
10/03/1978US4117599 Apparatus for drafting inaccurate conic perspective
10/03/1978US4117598 Drawing instrument or apparatus
09/1978
09/05/1978CA1037928A1 Instrument pen with integral pen arm attachment means
08/1978
08/15/1978US4106202 Apparatus for indicating the angle of a drafting parallel
08/08/1978US4106031 Automatic drafting device
07/1978
07/25/1978US4102050 Cursor assembly
07/25/1978US4102048 Device for correcting positional deviation and reduced scale of photograph
07/11/1978US4099330 Vibratory drawing device
06/1978
06/27/1978US4097874 Blocking assembly for an automatic drafting device
06/27/1978US4097142 Optical pattern tracer
05/1978
05/30/1978US4091980 Apparatus for advancing sheet material
05/23/1978US4091393 Automatic pencil apparatus for an automated drafting system
05/23/1978US4090301 Graphic recording system
05/09/1978US4087916 Drawing table with a telescopic arm
04/1978
04/18/1978US4084329 Protractor-type hatching control device
03/1978
03/28/1978US4080742 Kit of parts for forming a curved member, and curved member formed thereby
03/28/1978US4080738 Copying device for tailor's trade
03/14/1978US4078312 Drafting parallel bar
02/1978
02/28/1978US4075762 Instrument for making perspective drawing
02/21/1978US4074437 Drafting template
02/21/1978US4074414 Process for the production of lettering or symbol templates
01/1978
01/31/1978US4070758 Straightedge supporting device for rail type drawing instrument
01/24/1978US4069588 Digitizer
01/17/1978US4068380 Device for dividing an angle
01/10/1978US4067112 Cutting guide for custom mats
12/1977
12/13/1977US4062648 Plotter with adaptive velocity means for improving plotted line quality
12/06/1977US4060901 Template for lining sheet music paper
12/06/1977US4060900 Angle measuring device
10/1977
10/18/1977US4054883 Ink pen device
10/18/1977US4053987 Multi-purpose drawing instrument
09/1977
09/27/1977US4051381 Device for the programmed tracing of designs by particle bombardment
09/20/1977US4048725 Feed index device in universal parallel ruler or the like
09/20/1977US4048724 Ellipsograph
09/13/1977US4047304 Drafting board with adjustable straight-edge assembly
06/1977
06/28/1977US4032768 Constant velocity vector generator
06/21/1977US4030200 Portable sewing aligning table system
05/1977
05/31/1977US4026644 Device for inscribing additional information on microfilms
05/31/1977US4026041 Two-dimensional drawing board manikin
05/31/1977US4026030 Drafting template
04/1977
04/26/1977US4019258 Device for attaching rollers to a carriage adapted to move along a rail
04/26/1977US4019256 Guide for tool or instrument
03/1977
03/29/1977US4015269 Automatic pencil apparatus for an automated drafting system
03/08/1977US4010547 Drafting machine
02/1977
02/22/1977US4008528 Drawing apparatus
02/22/1977US4008522 Chalkboard line tool
02/15/1977US4007542 Straightedge
01/1977
01/11/1977US4001941 Graphic reproduction apparatus
12/1976
12/14/1976US3996670 Protractor with digital readout
11/1976
11/02/1976US3988838 Artists device
11/02/1976US3988834 Egg marker
11/02/1976US3988833 Tracing scope
10/1976
10/05/1976US3984845 Projecting optical system for photodrawing machine
09/1976
09/28/1976US3983569 Instrument pen with integral pen arm attachment means
09/07/1976US3978587 Drafting system and apparatus
07/1976
07/20/1976US3971036 Plotting head for consumable marking material
04/1976
04/20/1976US3950853 Track type drafting machine
04/13/1976US3950762 Drawing method and drawing instrument
04/13/1976US3950085 Optical transformation drawing apparatus
04/06/1976US3947969 Drawing instruments
03/1976
03/23/1976US3945123 Device for drawing objects in perspective
02/1976
02/24/1976US3939588 Lettering guide apparatus
02/24/1976US3939564 Adjustable grid line device
02/17/1976US3939482 Writing apparatus
02/10/1976US3936942 Optical pantograph
02/03/1976US3936712 Interactive graphic system
02/03/1976US3935641 Adjustable drawing sweep
01/1976
01/06/1976US3930314 Drafting machine
01/06/1976US3930313 Drawing apparatus
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