US 2390636
Forward Citations
How Laszlo Biro Invented the Modern Ballpoint Pen
Patents that cite US 2390636 — inventions that reference this patent as foundational prior art in their own applications. High forward citation counts indicate an influential patent.
CITED BY
30 patents
IN PATENTLENS
0
Citation network
This patent has been cited by 30 later patents. Citation detail pages are being built out in Phase 2.
Forward citation data is sourced from the USPTO patent database. Only patents indexed in PatentBrief are shown as links.