You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "who owns the patent for the rfid chip?" whose answer is Charles Walton.
Each document should contain about 30 words, and these documents should contain useful information.

Query: RFID chip patent owners
Useful Output:

Doc 1: RFID was, however, officially invented in 1983 by Charles Walton when he filed the first patent with the word 'RFID'. NFC started making the headlines in
Doc 2: Title: Rfid Tag, Operating Method of Rfid Tag and Operating Method Between Rfid Tag and Rfid Reader  Patent Owner: Impinj Inc. Industry: High-Tech; P.O. Entity
Doc 3: The present invention relates to radio-frequency identification (RFID) tags that produce a unique radar signature by passive reflection of an electromagnetic
Doc 4: Patent Owner does not argue otherwise in its Response. We are persuaded that Atherton's RFID tag is an RFID device. Page 20. IPR2016-01763.
Doc 5: Dr. Mario Cardullo knew how valuable RFID would be in 2023, even before his passive RFID transponder was patented in 1973!