Hi. That was quick!
This is from a Curbow cousin's Ancestry.com family web site. she has given me and several others access to her files.

U.S. and International Marriage Records, 1560-1900
about Joseph Curbo
Name: Joseph Curbo
Gender: male
Birth Year: 1755
Spouse Name: Mary Corbin
Marriage
Year: 1783
Marriage State: MD
Number Pages: 1

So, that is the only sort of conformation that I have.

I will send her name and email address to your real email account. She may be of more help than I. She lives in Stone County, MO, I think.

Paul