Richard E. Liebetrau

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Cadillac, MI, US

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Patents Grantslast 30 patents

Information Patent Grant
Method of converting to a security glazing system
- Patent number 4,896,473
- Issue date Jan 30, 1990
- Richard E. Liebetrau
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
Information Patent Grant
Wall structure for machine enclosures
- Patent number 4,597,698
- Issue date Jul 1, 1986
- Richard E. Liebetrau
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Panel mounting system and method for mounting panels
- Patent number 4,571,902
- Issue date Feb 25, 1986
- Richard E. Liebetrau
- E04 - BUILDING
Information Patent Grant
Revolving door with security locking mechanism
- Patent number 4,060,935
- Issue date Dec 6, 1977
- Swiss Aluminium Limited
- Larry J. Miller
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Storage and display apparatus employing cantilevered roller track
- Patent number 4,030,609
- Issue date Jun 21, 1977
- Swiss Aluminium Ltd.
- Richard E. Liebetrau
- A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...