Robert H. Chorman

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Chardon, OH, US

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Patents Grantslast 30 patents

Information Patent Grant
Mine ventilation door with wings and slidable or pocket personnel door
- Patent number 10,538,956
- Issue date Jan 21, 2020
- American Mine Door Co.
- Daniel S. Zenisek
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Mine ventilation door with wings and slidable or pocket personnel door
- Patent number 9,476,301
- Issue date Oct 25, 2016
- American Mine Door Co.
- Daniel S. Zenisek
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Robust mine ventilation door with single actuation system
- Patent number 9,181,802
- Issue date Nov 10, 2015
- American Mine Door Co.
- Daniel S. Zenisek
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Control system for mine ventilation door
- Patent number 8,884,760
- Issue date Nov 11, 2014
- American Mine Door Co.
- Daniel S. Zenisek
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES

Patents Applicationslast 30 patents

Information Patent Application
MINE VENTILATION DOOR WITH WINGS AND SLIDABLE OR POCKET PERSONNEL DOOR
- Publication number 20170037676
- Publication date Feb 9, 2017
- AMERICAN MINE DOOR CO.
- Daniel S. Zenisek
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Application
CONTROL SYSTEM FOR MINE VENTILATION DOOR
- Publication number 20140022077
- Publication date Jan 23, 2014
- AMERICAN MINE DOOR CO.
- Daniel S. Zenisek
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Application
MINE VENTILATION DOOR WITH WINGS AND SLIDABLE OR POCKET PERSONNEL DOOR
- Publication number 20140024304
- Publication date Jan 23, 2014
- AMERICAN MINE DOOR CO.
- Daniel S. Zenisek
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Application
ROBUST MINE VENTILATION DOOR WITH SINGLE ACTUATION SYSTEM
- Publication number 20140020296
- Publication date Jan 23, 2014
- AMERICAN MINE DOOR CO.
- Daniel S. Zenisek
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES