Utility Patent Drawing Sheets

Produced 1 August 2026

Self-assessed

Where this came from

A four-element figure and its reference numerals, written here as vector geometry of the kind a buyer supplies

THE INPUT WAS WRITTEN HERE. I authored the geometry and the numeral list, so this is weaker evidence than the two SEC-sourced specimens and is labelled as such. What is not self-authored is the standard: 37 CFR 1.84 is public law, the acceptance criteria below are quoted from it by subsection, and every measurement is one you can reproduce against the PDF with a ruler and the regulation text. The sheet is checked against an external rule I do not control, which is the part that matters.

The first version of this checker failed a sheet that was exactly compliant.

A sheet was drawn to the letter ceiling in 37 CFR 1.84(g) and the checker rejected it. The checker was wrong, not the sheet. 1.84(g) publishes two sight ceilings, 17.0 by 26.2 cm for A4 and 17.6 by 24.4 cm for letter, and the first version applied the A4 number to a letter sheet. The sheet measured 17.6 by 24.4, which is the letter ceiling exactly, and was refused for exceeding a ceiling that did not apply to it. This is the failure mode worth naming, because it is invisible from the buyer side: a check with the wrong constant does not produce a wrong drawing, it silently refuses correct work and there is nothing in the output to tell you why. Both ceilings are now carried and the sheet passes all seven criteria.

Figures from the run

Published acceptance criteria met
7 of 7
Sheet size, 1.84(f)
21.6 x 27.9 cm
Sight used, against the 17.6 x 24.4 letter ceiling
17.6 x 24.4 cm
Stroke widths on the sheet, 1.84(l) allows one
1
Smallest reference character, 1.84(p)(3) floor is 0.32 cm
0.360 cm
Reference numerals supplied, and drawn
4 of 4
Numerals on the sheet not in your list
0
PDF written without a PDF library
1,119 bytes

Checks

  • met Sheet is 21.6 by 27.9 cm, per 1.84(f) Measured from the delivered PDF MediaBox, not from the value requested at input.
  • met Sight stays within the ceiling in 1.84(g) for the sheet size used 17.6 by 24.4 cm against the 17.6 by 24.4 letter ceiling. The A4 ceiling of 17.0 by 26.2 is a different number and is not applied to a letter sheet.
  • met One uniform stroke width, black, per 1.84(l) One width used across every line on the sheet.
  • met Reference characters are at least 0.32 cm high, per 1.84(p)(3) Smallest drawn character is 0.360 cm, set above the floor deliberately rather than at it.
  • met Sheet numbering is present, per 1.84(t) Numbered 1/1.
  • met View numbering is present, per 1.84(u) FIG. found on the sheet. The check searches for the label rather than assuming FIG. 1.
  • met Every numeral on the sheet appears in the list you supplied Numerals are read back out of the finished PDF and compared to your list. A numeral drawn that you did not name is a defect and refuses the delivery.

Limits

Bounds

The geometry in this specimen was written here, not supplied by a buyer. The standard it is checked against, 37 CFR 1.84, is public and external, but the input is not and that makes this weaker evidence than the SEC-sourced specimens.

Vector input only. This composes a sheet from geometry you already have and places the numerals you name. Turning a photograph or a scan into a line drawing is craft, it is not proven here, and it is not what is being sold.

The sheet is checked against 37 CFR 1.84. It is not checked against an examiner opinion, and nothing here is a legal opinion about your application.

Numeral consistency against your specification is a separate question and is not sold. That unit was closed after the numerals on a real granted patent proved unreadable.

The unit · Order it