Dear Ness Leong,
Thank you for posting your request on History Hub!
We suggest contacting the New York State Archives, New York City Municipal Archives, and the New York Public Library to see if they have any business records in their collections. Also, if you think she may have filed a patent for her inventions, we suggest searching the Online Patent Index at the United States Patent and Trademark Office.
We also suggest that you review NARA’s Resources for Genealogists, as well as the History Hub Blog titled Suggestions and Advice for Family History Researchers. Also, the FamilySearch Research wiki for United States Genealogy may be useful, specifically the guide to New York, United States Genealogy.
In addition, you can consult Irish Genealogy, a website dedicated to Irish genealogy research that is officially supported by Ireland’s Department of Culture, Heritage, and the Gaeltacht. They have a variety of church and civil records available for online use. We suggest that you review the NARA publication on Immigration Records, as well as the FamilySearch Research wiki for Irish Emigration & Immigration.
We hope this is helpful. Best of luck with your family research!
[from Brooklyn Daily Eagle, 25 Feb 1906, p. 6]
"Burr, Kings Co, Ireland" is probably Birr, Offaly, Ireland. Unfortunately exisiting baptismal records do not begin until 1838 for that town.
The following is from her extracted death certificate:
Name: Catherine F Gleisch
[Catherine F Hemsworth]
Gender: Female Race: White Marital status: Widow Age: 70 Birth Date: abt 1836 Birth Place: Ireland Years in US: 60 Years Death Date: 24 Feb 1906 Death Street Address: 492 Metropolitan Ave Death Place: New York City, Brooklyn, New York, USA Cause of Death: Cerebral Apoplexy Burial Date: 27 Feb Burial Place: Lutheran Occupation: Housewife Father's Birth Place: Ireland Mother's Birth Place: Ireland Father: Denton Hemsworth Mother: Charlotte Hemsworth Certificate Number: 4224