What is the significance of X-Series patents in the MPEP?
What is the significance of X-Series patents in the MPEP?
The MPEP 901.04 provides information about X-Series patents:
“X-Series patents were issued from the early 1800’s through the middle 1830’s.”
Key points about X-Series patents:
- They represent some of the earliest patents issued in the United States
- These patents were issued before the modern numbering system was established
- They are historically significant but may be less relevant for current patent searches
While X-Series patents are not commonly encountered in modern patent practice, understanding their existence is important for comprehensive historical patent research and for tracing the evolution of the U.S. patent system.
To learn more: