| Form type | Sec Links | Description | Filing date | Reporting date |
|---|---|---|---|---|
| SC 13G/A | Report | SC 13G/A | Feb 14, 2020 | |
| SC 13G/A | Report | SC 13G/A | Feb 13, 2019 | |
| SC 13G | Report | May 16, 2018 | ||
| SC 13G/A | Report | SC 13G/A | Feb 20, 2018 | |
| SC 13G/A | Report | PRIMARY DOCUMENT | Feb 15, 2018 | |
| SC 13G/A | Report | SC 13G/A | Feb 14, 2018 | |
| SC 13G | Report | SC 13G | Apr 19, 2017 | |
| SC 13G/A | Report | SC 13G/A | Apr 19, 2017 | |
| SC 13G/A | Report | SC 13G/A | Feb 10, 2017 | |
| SC 13G/A | Report | SC 13G/A | Feb 10, 2017 | |
| SC 13G/A | Report | SC 13G/A | Feb 11, 2016 | |
| SC 13G/A | Report | SC13G/A | Feb 11, 2016 | |
| SC 13G | Report | ZOOM | May 12, 2015 | |
| SC 13G/A | Report | SC 13G/A | Feb 12, 2015 | |
| SC 13G/A | Report | SC13G/A | Feb 12, 2015 | |
| SC 13G/A | Report | ZMPT 13G | Feb 14, 2014 | |
| SC 13G/A | Report | SCHEDULE 12-G/A | Feb 12, 2014 | |
| SC 13G/A | Report | SCHEDULE 13G/A | Feb 12, 2014 | |
| SC 13G/A | Report | SCHEDULE 13G/A | Feb 12, 2014 | |
| SC 13G | Report | SCHEDULE 13G | Aug 30, 2013 | |
| SC 13G/A | Report | SCHEDULE 13G | Aug 27, 2013 | |
| SC 13G | Report | ZMPT | Feb 15, 2013 | |
| SC 13G | Report | SC 13G | Feb 13, 2013 | |
| SC 13G/A | Report | SC 13G/A | Feb 13, 2013 | |
| SC 13G | Report | ZOOM TELEPHONICS 13G | Feb 13, 2013 | |
| SC 13G | Report | SC 13G | Feb 14, 2012 | |
| SC 13G/A | Report | SC 13G/A | Feb 14, 2012 | |
| SC 13G | Report | ZOOM DEC 31, 2011 | Feb 13, 2012 | |
| SC 13G | Report | REGISTRATION STATEMENT | Dec 5, 2011 | |
| SC 13G | Report | INITIAL ZOOM FILING | Nov 23, 2011 | |
| SC 13G | Report | Sep 27, 2011 | ||
| SC 13G/A | Report | AMENDMENT NO. 1 | Feb 9, 2011 | |
| SC 13G/A | Report | AMENDMENT NO. 1 | Feb 8, 2011 | |
| SC 13G | Report | FORM 13-G | Feb 16, 2010 | |
| SC 13G | Report | FORM 13-G | Feb 17, 2010 | |
| SC 13G | Report | REPORTING | Feb 16, 2010 |