DE 77h

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From at least 1902–1912, class 77h was defined as "Luftschiffahrt, auch Drachen".[1][2]

From the Swedish patent's office's "Introduction to the German Patent Classification (DPK)" online:[3]

The German Patent Office started developing a classification system for its patent documents in 1877. It was published in seven editions between 1906 and 1958, first as "Verzeichnis der deutschen Patentklassen" and later as "Gruppeneinteilung der Patentklassen". Between the editions, modifications were published in the form of "Änderungen" and "Ergänzungslieferungen".

The subsets of the German classes are listed in English on the Swedish site here, and in particular class 77's subsets, linked from that page, are listed here.

In that context, DE 77h covers the category of 'Racing; Riding sports; Equipment or accessories". DE 77h, it is suggested, maps to IPC A63K. We don't know whether those definitions were the same at the time of early aero.

In the data, this subcategory appears first in 1895. Before that DE 77 wasn't fractured into these subclasses.

References

  1. ↑ Verzeichnis der von dem Kaiserlichen Patentamt for 1902 (published 1903), p. 285
  2. ↑ Verzeichnis der von dem Kaiserlichen Patentamt for 1912 (published 1913), p. 411.
  3. ↑ [1]

This wiki has 105 patents in category "DE 77h".

Patents in category DE 77h


Enclosing categories DE 77
Subcategories DE 77h.2, DE 77h.3, DE 77h.4, DE 77h.5, DE 77h.6, DE 77h.7, DE 77h.9, DE 77h.10, DE 77h.11, DE 77h.12, DE 77h.15
Keywords racing, equipment, LTA, Kite, Drachen
Start year 1895
End year
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