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1960-01-14
Electric heating element andthe method of producing thesame
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1960-01-14
Electric heating element andthe method of producing thesame
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1959-12-22
Electric heaters and methods of making the same
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1959-07-21
Electric heaters and methods of making the same
AU231175B2
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1959-08-06
Electric heating device and method of making thesame
CA652051A
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1962-11-13
Methods of making electric heating units
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1957-09-17
Method of making sheathed electric heating units
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1959-05-05
Electric heaters
CA578260A
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1959-06-23
Electric heating units and methods of making the same
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1959-08-06
Electric heating device and method of making thesame
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1960-03-10
Electric heating element
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1960-03-10
Electric heating element
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1959-05-05
Electric heating element
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1959-08-04
Electrical heating of vessels
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1959-05-26
Electrical heating
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1958-05-01
Electric heating element and method of and apparatus for producing it
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1959-03-31
Electric heater
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1959-12-22
Electric heater
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1959-02-17
Electric heating means
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1960-04-28
Improvements relating to electrical heating apparatus
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1959-12-01
Electrical heating elements
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1959-01-27
Electric heating apparatus
CA570365A
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1959-02-10
Electric heating apparatus
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1959-12-15
Electric heating apparatus
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1959-02-03
Electrical heating unit