What this record means
The record shows that the application for the mark JACK, filed by Jack Studios Inc., a New York corporation, was abandoned on Oct 25 2011 after an inter partes decision by the TTAB, so it is not a live or registered mark. The only goods listed are in International Class 009 and cover eyewear and related items such as eyeglasses, sunglasses, frames, carrying cases, pouches and repair tools; a similar name used for those kinds of products would raise the closest record‑based concern. Because the filing was abandoned, the record does not give the owner control over every use of the word JACK in other categories, but it does indicate a past claim in the eyewear space. The prosecution history is empty, and the record contains no oppositions, cancellations or other enforcement actions, so no enforcement signal appears. I'd treat this as a moderate concern if you plan to market eyewear under a similar name, but the risk is far lower for unrelated goods.
Informational only - not legal advice.