Douglas W. Hart

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Long Lake, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Toilet waste tank
- Patent number D356851
- Issue date Mar 28, 1995
- Satellite Industries, Inc.
- Ronald J. Holmstadt
- D23 - Environmental heating and cooling
Information Patent Grant
Portable restroom
- Patent number D354142
- Issue date Jan 3, 1995
- Satellite Industries, Inc.
- George E. McNamara
- D25 - Building units and construction elements