Hartzell H. Schmidgall

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Mediapolis, IA, US

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Patents Grantslast 30 patents

Information Patent Grant
Trailer and unloading device
- Patent number 8,500,383
- Issue date Aug 6, 2013
- Hartzell H. Schmidgall
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Automated system for handling and cleaning concrete pipe-making com...
- Patent number 5,587,185
- Issue date Dec 24, 1996
- Hawkeye Concrete Products Co.
- Hartzell H. Schmidgall
- B08 - CLEANING
Information Patent Grant
Concrete pipe making machine
- Patent number 4,708,621
- Issue date Nov 24, 1987
- Hawkeye Concrete Products Co.
- Hartzell H. Schmidgall
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
Apparatus for lining pipe
- Patent number 4,657,498
- Issue date Apr 14, 1987
- Hawkeye Concret Products Co.
- Jon A. Schmidgall
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
Method for lining pipe
- Patent number 4,578,235
- Issue date Mar 25, 1986
- Hawkeye Concrete Products Co.
- Jon A. Schmidgall
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
Spacer for reinforced concrete structures
- Patent number 4,301,638
- Issue date Nov 24, 1981
- Hawkeye of Iowa, Ltd.
- Hartzell H. Schmidgall
- E04 - BUILDING