DE 65a

German patent classification Klasse 65a was named . . .

The category started circa . . . 1900?

This wiki has 1 patents in category "DE 65a".

Patents in category DE 65a

• Patent DE-1902-141656 (English title: screw propeller, Inventors: Joseph Hofmann, Filing date: 1902-06-07, Applicant firm: Joseph Hofmann)

References

Enclosing categories	German patent classifications, DE 65
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