John L. McDonald

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Phoenix, NY, US

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Patents Grantslast 30 patents

Information Patent Grant
Large bore gun cleaning apparatus with expanding disc mandrels
- Patent number 10,948,256
- Issue date Mar 16, 2021
- Otis Products, Inc.
- John L. McDonald
- B08 - CLEANING

Patents Applicationslast 30 patents

Information Patent Application
LARGE BORE GUN CLEANING APPARATUS WITH EXPANDING DISC MANDRELS
- Publication number 20190107357
- Publication date Apr 11, 2019
- OTIS PRODUCTS, INC. D/B/A OTIS TECHNOLOGY
- John L. McDonald
- F41 - WEAPONS