The certainly look like Japanese maple seeds.
If you are looking at your 1-metre tall tree from above, the seeds will be hidden under the leaves, and the flowers (which won't be there any more) are very inconspicuous.
If you want to plant them, they will not germinate unless they have a winter cold period.
If you just plant them in the ground, that will happen naturally if you have the right winter climate, and they will germinate next spring. Otherwise, you need to keep them in a refrigerator (but not in a freezer!) for 90 to 120 days before you plant them.