Johannes Bakker

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Calgary, CA

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Patents Grantslast 30 patents

Information Patent Grant
Filter screen apparatus for the air outlet of a particle production...
- Patent number 4,946,481
- Issue date Aug 7, 1990
- Shell Oil Company
- Johannes Bakker
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Method and apparatus for filtering the air outlet of a solid sulphu...
- Patent number 4,705,467
- Issue date Nov 10, 1987
- Shell Oil Company
- Johannes Bakker
- C01 - INORGANIC CHEMISTRY