Patent comparison

Compare Patents

Compare two patents side by side. Add ?a=us/7657849&b=us/8046721 to the URL to load specific patents.

US 3713148

How Radio Frequency Identification (RFID) Tags Were Invented

A 1970 patent describing a remote tag that powers itself using incoming radio signals to read and write data, forming the foundation of modern RFID technology.

Statusexpired

Granted1973

Expires1990

Claims9

Forward citations185

Prior art2

AssigneeCommunications Services Corp Inc

InventorsM Cardullo, W Parks

Read full analysis →

Patent B

Add ?b=us/7657849 to compare

Find a patent

How to use

Bookmark a comparison URL to save it. Format: /compare?a=[country]/[number]&b=[country]/[number]. Example: /compare?a=us/7657849&b=us/8046721