Patent drawing software for figure annotation.
Number patent figures fast. Place reference numbers and leader lines in two clicks, and import a reference list from CSV or Excel to number a full figure set in one pass.
7-day free trial · No credit card required
Two clicks per callout
Click where the number goes, click what it points at, and the leader line is drawn. No pen tool, no text box to align afterwards.
Import the list you already have
Bring numerals and descriptions in from CSV, XLSX or XLS, then drag each onto the drawing. Placed numbers are marked off as you go.
Export ready for review
Export an annotated PDF, then check page dimensions, text, and callout placement before filing.
7-day free trial · No credit card required
The founder story
Built around the work of a patent illustrator.
Annotra was built by Michael Williams, a patent illustrator and the founder of American Patent Drawings (APD), his patent illustration company. Michael designed Annotra from hands-on patent drawing work to bring reference numbers, leader lines, figure labels and PDF export into one focused workflow, built by someone who understands the work firsthand.
Michael Williams
Founder of Annotra and American Patent Drawings
Annotra is an early-stage product and brand of Design Serious LLC, based in Scottsdale, Arizona.
Ready to Annotate Your Patent Figures?
Annotra is free to try for seven days on your own patent drawings, with every Pro feature included. Import a PDF drawing, place reference numbers and leader lines, and export an annotated PDF to check the result before you decide whether to subscribe.
7-day free trial · No credit card required