I've been scanning Minox 8x11 mm negatives with a variety of scanners and copy camera techniques since 1996.
Nearly any flatbed scanner returns, at best, web resolution results. They simply can't place the film with enough accuracy to obtain their full resolution capabilities.
A 4000 ppi film scan obtained with a Nikon Coolscan V using a thin card stock negative carrier/mask that fits into the six-strip 35mm carrier and using VueScan (so that I can target the precise point on the film for the scanner to focus on) returns excellent resolution scans that are 1260x1732 pixels in size (2.2 MPixels). I've made very nice prints up to 6x8 inch in size from these scans. Larger is possible if you up-rez the image by 1.414x (netting a 4 Mpixel image and up to a clean 11x14 inch image at a reasonable print density).
My more recent approach is to use the Leica SL as a copy camera. Using a Focusing Bellows-R at near-full extension (around reproduction ratio 2.7:1) and a Summicron-R 50mm f/2 lens nets a 21 Mpixel image of the Minox negative that can make exhibition quality photographs. Example:
Deutsches Museum - Munich 1997
Minox B, APX100 - HC110
Processed 01 Mar 98, Taken Nov 97
Here's the negative:
And here's the capture setup:
From top to bottom:
M Adapter T
R Adapter M
Summicron-R 50mm f/2
flat panel light box
I normally use a black card stock mask to hold the negative strip and make it easy to handle. (This sample photo I simply slid the negative strip under the lens and centered it.)