Donovan Construction Company

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Irvine, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Concrete pipe forming machine
- Patent number 4,125,579
- Issue date Nov 14, 1978
- Donovan Construction Company
- Thomas W. Barber
- E04 - BUILDING
Information Patent Grant
In situ concrete pipe forming machine
- Patent number 4,093,409
- Issue date Jun 6, 1978
- Donovan Construction Company
- Thomas W. Barber
- E04 - BUILDING

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