US 3789409
Prior Art
How Passive Satellite Navigation Works Without Sending Signals
Patents that US 3789409 cites as prior art — the earlier inventions that this patent builds upon or distinguishes itself from.
CITED PATENTS
6
IN PATENTLENS
0
Citation data
This patent cites 6 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.