You can freely build on John Holland's Design for an Early Submarine Boat
This patent expired in 1924. 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
1906
Expired
1924
Forward citations
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What this patent covers
While specific claim details are unavailable for this patent, titled 'Submarine boat,' it describes the fundamental components and operation of an early submersible vessel. John P. Holland's designs typically included a hull capable of withstanding water pressure, ballast tanks for diving and surfacing, and a propulsion system for underwater travel. Such a submarine would submerge by filling its ballast tanks with water, then surface by expelling the water using compressed air. It would also feature control surfaces, like hydroplanes, to manage depth and direction while submerged.
What is now free to use
All 0 claims of US 815350 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 submarines propelled by nuclear reactors or advanced air-independent propulsion systems.
Does not cover surface-only naval vessels like battleships or destroyers.
Does not cover remotely operated underwater vehicles (ROVs) or autonomous underwater vehicles (AUVs) without human crews.
Does not cover diving bells or other stationary underwater habitats.
Does not cover submersibles designed exclusively for deep-sea exploration without military capabilities.
Who is building on this today
Modern naval shipbuilding companies like General Dynamics Electric Boat, Huntington Ingalls Industries, Naval Group, and BAE Systems continue to build advanced submarines. While the core principles of buoyancy and propulsion remain, these companies integrate cutting-edge technologies for stealth, weaponry, and endurance.
Products built on expired version of this technology
Holland VI submarine
USS Holland (SS-1)
Early Royal Navy Holland-class submarines
Early Imperial Japanese Navy Holland-type submarines
How to cite this patent in your documentation
Individual. US Patent 815350. Submarine boat.. Granted 1906, expired 1924. 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.