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Ownership
SC 13D/A
Zoom Telephonics, Inc.
14 Oct 20
4
Zoom Telephonics, Inc.
13 Oct 20
SC 13D
Zoom Telephonics, Inc.
25 Sep 20
4
Zoom Telephonics, Inc.
15 Jul 20
4
Zoom Telephonics, Inc.
28 May 20
4
Zoom Telephonics, Inc.
3 Mar 20
SC 13G/A
Zoom Telephonics, Inc.
14 Feb 20
4
Zoom Telephonics, Inc.
28 Jan 20
4
Zoom Telephonics, Inc.
4 Sep 19
SC 13G/A
Zoom Telephonics, Inc.
13 Feb 19