Description
ARTICLES FOR WRITING OR DRAWING UPON; ACCESSORIES FOR WRITING OR DRAWING (workshop equipment for marking-out work B25H 7/00; teaching hand-writing or drawing G09B 11/00)
B43L
Technology
Stats
- 854 US PATENTS IN FORCE
- 234 US APPLICATIONS PENDING
- 886 Total Patent Owners
- 3,811 TOTAL INVENTORS
Subclasses
| Subclass | Title |
|---|---|
| 1/00 | Repeatedly-usable boards or tablets for writing or drawing (drawing-boards B43L 5/00) |
| 1/02 | Repeatedly-usable boards or tablets for writing or drawing (drawing-boards B43L 5/00) Slates |
| 1/04 | Repeatedly-usable boards or tablets for writing or drawing (drawing-boards B43L 5/00) Blackboards (easels or stands for blackboards A47B 97/04) |
| 1/06 | Repeatedly-usable boards or tablets for writing or drawing (drawing-boards B43L 5/00) Blackboards (easels or stands for blackboards A47B 97/04) rigid |
| 1/08 | Repeatedly-usable boards or tablets for writing or drawing (drawing-boards B43L 5/00) Blackboards (easels or stands for blackboards A47B 97/04) flexible |
| 1/10 | Repeatedly-usable boards or tablets for writing or drawing (drawing-boards B43L 5/00) Blackboards (easels or stands for blackboards A47B 97/04) Writing surfaces thereof |
| 1/12 | Repeatedly-usable boards or tablets for writing or drawing (drawing-boards B43L 5/00) having translucent writing surfaces producing visual impressions by co-operation with backing members |
| 3/00 | Writing or drawing-underlays, e.g. blotting pads (blotters B43L 17/00) |
| 5/00 | Drawing-boards (drawing-desks or tables A47B 27/00, A47B 85/02; stands for drawing-boards A47B 97/04) |
| 5/02 | Drawing-boards (drawing-desks or tables A47B 27/00, A47B 85/02; stands for drawing-boards A47B 97/04) having means for clamping sheets of paper thereto (drawing-pins B43M 15/00) |
| 7/00 | Straightedges (guides for rulers other than for T-squares B43L 13/04; curve rulers or templets B43L 13/2; straightedges characterised by the provision of indicia or the like for measuring, e.g. rulers or tapes with measuring scales or marks for direct reading, G01B) |
| 7/02 | Straightedges (guides for rulers other than for T-squares B43L 13/04; curve rulers or templets B43L 13/2; straightedges characterised by the provision of indicia or the like for measuring, e.g. rulers or tapes with measuring scales or marks for direct reading, G01B) T-squares |
| 7/027 | Straightedges (guides for rulers other than for T-squares B43L 13/04; curve rulers or templets B43L 13/2; straightedges characterised by the provision of indicia or the like for measuring, e.g. rulers or tapes with measuring scales or marks for direct reading, G01B) Plural non-adjustable straightedges fixed at right angles (B43L 7/02 takes precedence) |
| 7/033 | Straightedges (guides for rulers other than for T-squares B43L 13/04; curve rulers or templets B43L 13/2; straightedges characterised by the provision of indicia or the like for measuring, e.g. rulers or tapes with measuring scales or marks for direct reading, G01B) Plural non-adjustable straightedges forming non-right angles |
| 7/04 | Straightedges (guides for rulers other than for T-squares B43L 13/04; curve rulers or templets B43L 13/2; straightedges characterised by the provision of indicia or the like for measuring, e.g. rulers or tapes with measuring scales or marks for direct reading, G01B) with rollers (with interconnected rollers B43L 13/02) |
| 7/08 | Straightedges (guides for rulers other than for T-squares B43L 13/04; curve rulers or templets B43L 13/2; straightedges characterised by the provision of indicia or the like for measuring, e.g. rulers or tapes with measuring scales or marks for direct reading, G01B) with arrangements for attaching additional drawing equipment, e.g. for hatching, dotting |
| 7/10 | Straightedges (guides for rulers other than for T-squares B43L 13/04; curve rulers or templets B43L 13/2; straightedges characterised by the provision of indicia or the like for measuring, e.g. rulers or tapes with measuring scales or marks for direct reading, G01B) Plural straightedges relatively movable |
| 7/12 | Straightedges (guides for rulers other than for T-squares B43L 13/04; curve rulers or templets B43L 13/2; straightedges characterised by the provision of indicia or the like for measuring, e.g. rulers or tapes with measuring scales or marks for direct reading, G01B) Plural straightedges relatively movable Square and pivoting straightedges |
| 7/14 | Straightedges (guides for rulers other than for T-squares B43L 13/04; curve rulers or templets B43L 13/2; straightedges characterised by the provision of indicia or the like for measuring, e.g. rulers or tapes with measuring scales or marks for direct reading, G01B) Plural straightedges relatively movable Square and sliding straightedges |
| 9/00 | Circular curve-drawing or like instruments (curve rulers or templets B43L 13/2) |
Recent Patents
Not Available
Recent Publications
Not Available
Top Owners in This Class
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Applications Filed in This Class - By Year
Patents Issued To Date - By Filing Year
Average Time to Issuance
- 29 Months (last 2 years Issuances)
- 29 Months (last 5 years Issuances)