Nicolaas Abraham Zondag

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Roosendaal, NL

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Patents Grantslast 30 patents

Information Patent Grant
Methods and plugs to seal apertures in tube plates of heat exchange...
- Patent number 4,074,630
- Issue date Feb 21, 1978
- Explosive Metal Working Holland B.V.
- Nicolaas Abraham Zondag
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Method of sealing apertures in tube plates of heat exchangers using...
- Patent number 4,021,907
- Issue date May 10, 1977
- Explosive Metal Working Holland B.V.
- Nicolaas Abraham Zondag
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Methods for welding two metal pieces of tubing with their ends to e...
- Patent number 3,986,735
- Issue date Oct 19, 1976
- Explosive Metal Working Holland B.V.
- Nicolaas Abraham Zondag
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR