Enter the power of the web.
We googled the patent number and came up with this webpage. Our little bottle was about halfway down the page:
From the author's site:
Mr. Owen E. Raab's Patented Ink Bottle (No. 1,759,866)
It Makes it Easy to Fill Your Pen
Click here if you want to learn how to get Patent Drawings
Society is indebted to Mr. Owen E. Raab of Seattle, Washington for the invention of a "significant improvement in combined wells and bottles". His Patent No. 1,759,866 was granted on May 27, 1930 and signalled the demise of the penwiper industry.
Anyhow, a fun little find; the boy has the treasure-finding gift. Perhaps he got it from his genetic link to Hyrum and his brother Joseph...