Pieter Barteld Van Leggelo

Pieter Barteld Van Leggelo was an aero inventor, who on his British patent described himself as a Dutch physician, "recently of Batavia Java, now residing at No. 2405, West 6th Street," Los Angeles, California.

He is cited a couple of times in a graduate brochure/book, having been born or graduated around 1867: tijdschrift_3771.pdf, [1],

Born 1867, I think, and married in 1900. Details here: [2]

This US patent was cited a lot, later: https://patents.google.com/patent/US1485649

He had German patent 198031? [ORIGINAL PATENT APPLICATION NUMBER 198,031 FOR IMPROVED MEANS FOR USE IN PROPELLING AEROPLANE, HYDROPLANE AND OTHER CONVEYANCES. (GERMANY). Tapa dura – 1 Enero 1922, de Pieter Barteld van. Leggelo (Author)]

• Or it's a British patent, per p326 of this: https://apps.dtic.mil/sti/pdfs/AD0857462.pdf -- British patent 198031, May 22 1923, by Pieter Barteld Leggelo, for Improved means for use in propelling aeroplane, hydroplane, and other conveyances -- can't find on espacenet a patent of his with that number from either country.

• Born on November 26, 1867 in Winsum, NL? Source: https://www.openarch.nl/hua:A5E9654D-0949-C413-E053-4701000A92C2
• Died in Sept 1954? Source: https://www.openarch.nl/hga:EB7EEEF5-FCA9-4A9F-8C87-A858790B43D2
• 1923 US patent: https://books.google.com/books?id=XyVe950pMBQC&lpg=PA131&ots=JlQ82zQk09&dq=Pieter%20Barteld%20Van%20Leggelo&pg=PA131#v=onepage&q=Pieter%20Barteld%20Van%20Leggelo&f=false]
• family info: https://gw.geneanet.org/edriessen?lang=en&iz=3&p=pieter+barteld&n=van+leggelo

Patents whose inventor or applicant is Pieter Barteld Van Leggelo

• Patent US-1918-1435190 (English title: Direct-ascent flying machine, Filing date: 1918-01-05)
• Patent FR-1919-496275 (Filing date: 1918-03-02)
• Patent GB-1918-122164 (English title: Improvements in and relating to Air-craft of the Helicopter Type, Supplementary to patent: Patent US-1918-1435190, Filing date: 1918-04-03)

References

Names	Pieter Barteld Van Leggelo
Birth date
Death date
Countries	US, NE, Java
Locations	Java; Los Angeles; Netherlands
Occupations	physician
Tech areas	Helicopter
Affiliations
Wikidata id