Most inversion table manufacturers provide electronic versions of the user manual on their websites. Visit the website of the manufacturer of the inversion table and search the product description section for a link to the user manual.
The first step to locate the manual for an inversion table is to determine which inversion table manual you need by checking the inversion table itself for a label indicating the specific name of the inversion table model or the name of the manufacturer. It will help if you have the model number as well, in the case that the manufacturer makes multiple models of the inversion table. Next, go to the manufacturer's website and locate the product description that matches your particular inversion table. Most manufacturers include a link to the .PDF version of the user manual there.
If you are unable to locate the inversion table manual you need online after following these steps, consider contacting the manufacturer directly to request it using the contact information provided on its website. If the manufacturer is unable to provide the manual to you directly, as a last resort you can search Ebay.com for any hard copies of the manual that may be available for sale.