Apparatus for forming helical ridges on the inside surface of externally finned tube
IL41229A0Inactive Publication Date: 1973-03-30ARMATUREN GES
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Patent Information
- Application Number
- IL412
- Authority / Receiving Office
- IL · IL
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 1972-02-07
- Filing Date
- 1973-01-03
- Publication Date
- 1973-03-30
- Estimated Expiration
- Not applicable · inactive patent
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