Simple past tense and past participle of patter.(verb)
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Use "pattered" in a sentence
"Only one was allowed per person, so there was not much scrambling, but some of the coins pattered down on the various instruments, and one landed in the old gentleman's middle-C water glass and had to be fished out before he could go on with the Hymn."
"Finally, one rainy Saturday afternoon, when we were tired of acting plays, and the rain pattered on the roof, and the wind howled and shook the casings, and there was a generally wild and disorganized state of affairs out of doors, a sympathetic spirit of insubordination appeared to awaken in Tina's bosom."
"As my waking sense returned, the bare walls of the guard room closed round me, and the rain pattered against the single window."