You can freely build on Nikola Tesla's Remote Control System for Boats
This patent expired in 1918. Every claim — 0 independent, 0 dependent — is now unenforceable. Anyone can use, reproduce, manufacture, sell, or offer for sale this technology without a license.
Original assignee
Individual
Patent granted
1898
Expired
1918
Forward citations
15
What this patent covers
This patent describes a system for controlling a vessel from a remote location using electromagnetic waves. A receiver on the boat detects these waves, which trigger a sensitive device—a cylinder filled with metal grains—to activate internal relays. These relays then control electric motors that handle the vessel's propulsion and rudder position. The system uses a clockwork mechanism to reset the receiver after each signal, ensuring it remains ready for the next command.
What is now free to use
All 0 claims of US 613809 are in the public domain. Specifically:
The 0 dependent claims add narrowing limitations and are also free.
What is NOT covered
Patent expiry frees this specific invention. Separately-patented improvements made after expiry may still be protected.
Does not cover modern digital radio communication protocols like Bluetooth or Wi-Fi.
Does not cover autonomous navigation systems that rely on GPS or onboard sensors.
Does not cover systems that use infrared light for signaling.
Does not cover software-based control algorithms.
Who is building on this today
Modern drone manufacturers like DJI and defense contractors building unmanned naval vessels build upon the fundamental concept of remote telemetry and command-and-control that Tesla pioneered here.
Products built on expired version of this technology
Radio-controlled model boats
Early remote-controlled torpedoes
Foundational concepts for modern drones
How to cite this patent in your documentation
Individual. US Patent 613809. Method of and apparatus for controlling mechanism of moving vessels or vehicles. Granted 1898, expired 1918. Now in the public domain.
Note: This is a convenience citation. Consult a patent attorney for formal freedom-to-operate analysis.
PatentBrief is an educational resource and does not provide legal advice. Patent expiration information is derived from USPTO records and may not reflect continuation patents, divisional filings, or separately-patented improvements. For commercial use or production decisions, obtain a formal freedom-to-operate (FTO) opinion from a registered patent attorney.