APPA TECHNOLOGY CORP.
24Patents
5Active
24Granted
29Portfolio score
Filing activity: Feb 15, 1991 → Apr 3, 2019 · 2 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| USD419464S | Portable electrical multimeter | General | 23 | Expired |
| USD601047S1 | Electric meter (I) | General | 21 | Expired |
| USD472830S1 | Clamp type electrical multimeter (II) | General | 20 | Expired |
| USD472828S1 | Electrical multimeter | General | 20 | Expired |
| USD450002S | Clamp type electrical multimeter | General | 19 | Expired |
| USD515952S1 | Multimeter | General | 18 | Expired |
| USD446463S | Electrical multimeter with a stand | General | 16 | Expired |
| USD517434S1 | Clamp multimeter | General | 14 | Expired |
| US6646562B1 | Hooking-type fully automatic electric meter | Physics | 13 | Expired |
| USD585315S1 | Electric meter (II) | General | 13 | Expired |
| USD446137S | Electrical multimeter with a stand | General | 12 | Expired |
| USD332574S | Clamp multimeter | General | 11 | Expired |
| USD628918S1 | Hooking-type electric meter | General | 10 | Expired |
| USD515953S1 | Clamp multimeter | General | 10 | Expired |
| USD472829S1 | Clamp type electrical multimeter (I) | General | 10 | Expired |
| USD585316S1 | Electric meter (III) | General | 8 | Expired |
| USD724449S1 | Multi-functional infrared thermometer | General | 6 | Active |
| USD434683S | Induction type electrical multimeter | General | 5 | Expired |
| US7323859B2 | Auto-measuring universal meter | Physics | 4 | Active |
| USD813697S1 | Electric meter | General | 3 | Active |
| USD363441S | Electrical multimeter | General | 3 | Expired |
| USD446138S | Clamp type electrical multimeter | General | 2 | Expired |
| USD787353S1 | Electric meter | General | 2 | Active |
| US11307224B2 | Measuring rod for electric meter and electric meter assembly using the same | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.