Drilldown: Patents
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Patents > Year granted:
1904
& Inventor country
:
CH
or
DE
or
ES
or
HU
or
NL
& Applicant type
:
Hermann Burkardt
or
INDIV
& Grant date:
1900 - 1999
& CPCs
:
CPC B64B1/40
or
CPC B64C23/005
or
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Showing below up to 11 results in range #1 to #11.