US 4195637
Prior Art
Catheter System for Opening and Closing Body Passages
Patents that US 4195637 cites as prior art — the earlier inventions that this patent builds upon or distinguishes itself from.
CITED PATENTS
13
IN PATENTLENS
0
Citation data
This patent cites 13 prior patents. Citation detail pages are being built out in Phase 2.
Prior art citations are sourced from the USPTO patent database. Only patents indexed in PatentBrief are shown as links — others are recorded by number only.