Hitachi Ltd.
Patent owner in reexamination·8 ex parte reexams
Hitachi Ltd.'s patents have been the subject of 8 USPTO ex parte reexaminations. Its patents are most often challenged by Apple Inc., John R. Mills, and Eric P. Mirabel. ExamPat indexes the full prosecution record for each proceeding, including office-action grounds, certificate outcomes, and downstream PTAB and Federal Circuit decisions.
Filings by year
Top requesters
Outcome track record
How reexams of this owner's patents resolve: claims confirmed, amended, mixed, or fully canceled.
- Certificate outcome split across every bucket
- Claim-survival rate
Defense metrics
Claim-survival rate, average pendency, and the open/closed split across every reexam of this owner's patents.
- Survival rate of closed proceedings
- Average pendency in months
Challengers & examiners
Which requesters most often challenge this owner's patents, and which examiners decide them.
- Top requesters
- Most frequent examiners
Recent reexaminations (8)
| Control # | Filed | Patent | Title | Requester | Status |
|---|---|---|---|---|---|
| 90/014,673 | Feb 3, 2021 | 6,430,498 | PORTABLE TERMINAL WITH THE FUNCTION OF WALKING NAVIGATION | Apple Inc. | Closed |
| 90/013,479 | Mar 27, 2015 | 6,513,088 | DISPLAY UNIT AND METHOD ENABLING BI-DIRECTIONAL COMMUNICATION WITH VIDEO SOURCE | — | Closed |
| 90/013,478 | Mar 27, 2015 | 6,549,970 | DISPLAY UNIT WITH CONTROLLER ENABLING BI-DIRECTIONAL COMMUNICATION WITH COMPUTER | — | Closed |
| 90/013,388 | Nov 3, 2014 | 6,549,970 | Display Unit With Controller Enabling Bi-Directional Communication With Computer | — | Closed |
| 90/013,391 | Nov 3, 2014 | 6,513,088 | Display_Unit_and_Method_Enabling Bi_ Directional_Communication_With_Video_Source | — | Closed |
| 90/013,332 | Sep 3, 2014 | 5,858,123 | RARE EARTH PERMANENT MAGNET AND METHOD FOR PRODUCING THE SAME | — | Closed |
| 90/012,494 | Sep 11, 2012 | 6,247,090 | DISPLAY APPARATUS ENABLED TO CONTROL COMMUNICATABILITY WITH AN EXTERNAL COMPUTER USING IDENTIFICATION INFORMATION | John R. Mills | Closed |
| 90/020,007 | Jun 28, 2012 | 6,162,356 | CHIP FOR USE IN NUCLEIC ACID SEPARATION, STRUCTURAL ELEMENT AND PROCESS FOR FORMING THE STRUCTURAL ELEMENT | Eric P. Mirabel | Closed |
See the full reexam picture for Hitachi Ltd.
Certificate outcomes, pendency, and the parties and examiners behind these cases. Free to sign up.