You can freely build on Early Device for Tracking Objects with a Pen
This patent expired in 1979. 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
1962
Expired
1979
Forward citations
31
What this patent covers
The patent describes a tracing device that allows a user to track the movement of an object. A pen or stylus is attached to the object, and as the object moves, the pen draws its path on a surface. The device includes a mechanism to ensure the pen maintains contact with the surface and records the movement accurately. This could be used to map out the trajectory of a moving item.
What is now free to use
All 0 claims of US 3055113 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.
Digital or electronic tracing systems
Devices that do not physically mark a surface
Automated tracking without a physical stylus
Systems for tracking airborne or underwater objects
Methods of data storage or analysis of traced paths
Who is building on this today
Given the age and mechanical nature of this patent, it's unlikely that specific modern companies are directly building on this exact technology. However, the foundational concept of translating physical motion into recorded data is a precursor to modern digital tracking and mapping systems.
Products built on expired version of this technology
Early mechanical plotters
Analog motion recording devices
How to cite this patent in your documentation
Individual. US Patent 3055113. Tracing device. Granted 1962, expired 1979. 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.