Forward Citations

How the Wiffle Ball Design Works

Patents that cite US 2776139 — inventions that reference this patent as foundational prior art in their own applications. High forward citation counts indicate an influential patent.

CITED BY

43 patents

IN PATENTLENS

Citation network

This patent has been cited by 43 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.