Harold W. Schaefer

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Bloomington, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Method of making a brush-beater for a vacuum cleaner
- Patent number 4,312,542
- Issue date Jan 26, 1982
- National Union Electric Corporation
- Harold W. Schaefer
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Vacuum cleaner bag assembly
- Patent number 4,311,493
- Issue date Jan 19, 1982
- National Union Electric Corporation
- Harold W. Schaefer
- A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
Information Patent Grant
Self-propelled vacuum cleaner
- Patent number 4,249,281
- Issue date Feb 10, 1981
- National Union Electric Corporation
- Robert B. Meyer
- A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
Information Patent Grant
Vacuum cleaner bag assembly
- Patent number 4,240,812
- Issue date Dec 23, 1980
- National Union Electric Corporation
- Harold W. Schaefer
- A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
Information Patent Grant
Brush-beater for a vacuum cleaner and method for making the same
- Patent number 4,209,873
- Issue date Jul 1, 1980
- National Union Electric Corporation
- Harold W. Schaefer
- A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...