Person:Gerhard Zeilstra (1)

Gerhard Zeilstra has a patent for a locking nut. He also invented a locking bung as described in Scientific American.

Unfortunately, his inventing days were cut short by an industrial accident which left him blind, and after the death of his wife, institutionalized.

1. ↑ ^1.0 1.1 Michigan, United States. Michigan, Death Certificates, 1921-1952
   1929.

   Name: Gerhard Zeilstra
   Event Type: Death
   Event Date: 24 Nov 1929
   Event Place: Grand Rapids, Kent, Michigan, United States
   Gender: Male
   Age: 68
   Marital Status: Widowed
   Birth Date: 19 Jun 1861
   Birthplace: Netherlands
   Birth Year (Estimated): 1861
   Father's Name: Johan Zeilstra
   Mother's Name: Aleida Buisman
   
   "Michigan, Death Certificates, 1921-1952," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/KF32-S9Q : accessed 19 Sep 2014), Gerhard Zeilstra, 24 Nov 1929; citing Grand Rapids, Kent, Michigan, United States; 00082; FHL microfilm 1972822.

2. ↑ Kent, Michigan, United States. 1920 U.S. Census Population Schedule
   ED: 58 Page: 5B, 1920.

   Holland Union Benevolent Association
   Gerhard Neilstra, 58 (inmate, widowed, Holland)

3. ↑ Netherlands birth record to be located; probably Gelderland or Overijssel. Father is Jan Zeilstra; mother is most likely Derkjen van der Linden and not Alijda Buisman.