Patent Explorer
Browse, filter, and analyze 2 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US2060009A | Acoustic testing apparatus | JENNESS A ALDER | Expired / Lapsed | 1932-03-09 | 1936-11-10 | 1952-03-09 | 0.0 yrs | 0 | |
| US2043983A | Apparatus for determining amplitude of sound | JENNESS A ALDER | Expired / Lapsed | 1931-10-22 | 1936-06-16 | 1951-10-22 | 0.0 yrs | 0 |