Now, those are nice!
The first plate, where we have a mark looks to be early Qing Dynasty. Although that runs from 1644 to 1912, with a brief restoration in 1917, the mark is an ‘artemisia leaf’ in a style that likely puts it in the Kangxi period between 1662-1722. Later pieces have the leaf in ‘stiffer’ representations which don’t have the ‘flow’ of the way yours is painted. There are reproductions too, but to my eye yours looks good for circa 1700 plus or minus a bit.
Before you get too excited about its age, I did a quick benchmark check on auction prices and somewhere around the $80 mark seems to be the going rate for similar plates. The chips around the rim would knock a little off that.
It’s a shame the other pieces aren’t marked, but I would say the second plate is somewhat later and the other two pieces perhaps a little earlier. No easy way to tell without trawling through the Chinese pattern books. I would suggest getting a professional opinion in case you’re sitting on something more valuable.
The last piece incidentally is sometimes referred to as an ‘ink pot’ but it’s actually a water pot, used to wet the brush when painting or doing calligraphy with Chinese inks that came in dry block-form.