504 patents currently held
46 more in force are now held by other companies
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
154 more records may belong here and await a decision; they are not counted.
The next term ends in Dec 2026. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
75
Ending by 2030
Dec 2026
Next term end
406
Patent families
When these terms end
Held patents by the year their term ends
notable patents
fee due within 90 days
all others
Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
Notable: the highest-ranked patents in this portfolio by citations and family size. Fee due within 90 days: a maintenance fee is due within 90 days of when this page was computed and not yet paid.
Notable patents
Ranked by citations and family size, against patents of the same kind granted the same year. How we rank
Notable
Ends Dec 2035 · High confidence
Also notable
Ends Nov 2034 · High confidence
Also notable
Ends Sep 2036 · Medium confidence
Trigger Frame Format for Orthogonal Frequency Division Multiple Access (OFDMA) Communication
US 10,334,571
Cited by 104 later US patents, top 5% of utility patents granted in 2019 in our data. Protection runs to 2035.
Sounding and Tone Block Allocation for Orthogonal Frequency Multiple Access (OFDMA) in Wireless Local Area Networks
US 9,473,341
Cited by 60 later US patents, top 10% of utility patents granted in 2016 in our data, and renewed at every maintenance window due so far. Protection runs to 2034.
Binding Machine
US 11,459,778
Cited by 15 later US patents, top 10% of utility patents granted in 2022 in our data. Protection runs to 2036.
Formerly held, still cited
Notable
Ends Sep 2033 · High confidence
Cited by 33 later US patents, top 10% of utility patents granted in 2018 in our data, and renewed at every maintenance window due so far. Protection runs to 2033.
now held by DDP Specialty Electronic Materials US, LLC
Fee deadlines
Maintenance fees fall due 3.5, 7.5 and 11.5 years after grant. A missed fee ends a patent at the end of the six month grace period that follows, not on the due date.
- 3 fees due Dec 11 to 25, 2026 · next Dec 11
- 5 fees due Jan 2 to 25, 2027 · next Jan 2
- 8 fees due Feb 8 to 25, 2027 · next Feb 8
- 6 fees due Mar 1 to 24, 2027 · next Mar 1
- 20 fees due Apr 1 to 29, 2027 · next Apr 1
- 4 fees due May 5 to 24, 2027 · next May 5
- 9 fees due Jun 3 to 29, 2027 · next Jun 3
- 8 fees due Jul 2 to 30, 2027 · next Jul 2
- 11 fees due Aug 4 to 27, 2027 · next Aug 4
- 12 fees due Sep 3 to 30, 2027 · next Sep 3
- 9 fees due Oct 2 to 28, 2027 · next Oct 2
- 4 fees due Nov 3 to 12, 2027 · next Nov 3
Recent changes
- Sep 18Assignment recorded on 1 record: Yamashita, Michio to Max Co., Ltd. Recorded Sep 18, 2026, executed Aug 6, 2026. Conveyance as recorded: Assignment of Assignor's Interest. A recorded assignment is a filed document, not a statement of current ownership. Reel 76504, frame 171.
- Sep 17Assignment recorded on 1 record: Yamashita, Michio to Max Co., Ltd. Recorded Sep 17, 2026, executed Aug 3, 2026. Conveyance as recorded: Assignment of Assignor's Interest. A recorded assignment is a filed document, not a statement of current ownership. Reel 76495, frame 48.
- 14 of the patents on this record were granted since Aug 16, 2026
- 4 terms have ended since Aug 16, 2026
What they patent
The 5 largest of its 406 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Brake System of Wire Reel in Reinforcing Bar Binding Machine | 9 in force | to Jul 2031 |
| Methods and Apparatus for Increasing the Number of Training and Data Tones in Wireless Communications Systems | 5 in force | to Feb 2036 |
| Short Training Field for Wifi | 5 in force | to Dec 2035 |
| Binding Machine (2017) | 4 in force | to Dec 2037 |
| Binding Machine (2017) | 4 in force | to Apr 2037 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,703,651 | Driving Tool In force · High confidence | In force | High confidence | |
| US 7,946,462 | Electric Stapler In force · High confidence | In force | High confidence | |
| US 7,858,219 | Locking Mechanism of Battery Pack In force · High confidence | In force | High confidence | |
| US 7,534,314 | High Carbon Steel with Superplasticity In force · High confidence | In force | High confidence | |
| US 7,938,304 | Electric Stapler In force · High confidence | In force | High confidence | |
| US 8,501,700 | Method to Enhance Delivery of Glutathione and Atp Levels in Cells held by Max International, Inc. In force · High confidence | In force | High confidence | |
| US 8,371,489 | Cylindrical Contact Arm Having a Tapered Guide Section in a Power-Driven Nailing Machine In force · High confidence | In force | High confidence | |
| US 7,703,648 | Gas Combustion Type Driving Tool In force · High confidence | In force | High confidence | |
| US 7,762,443 | Gas Combustion Type Driving Tool In force · High confidence | In force | High confidence | |
| US 7,857,182 | Stapler In force · High confidence | In force | High confidence |
Also on record, not counted in the 504: 46 patents in force now held by others · 223 patents ended · 99 applications pending · 164 applications abandoned. List them
Sources and methods
Compiled from USPTO application file histories, grants and recorded assignments, with the company's own names reviewed by hand. How this record was built
Portfolio grouped automatically from ownership conveyances to the names matched to this company, usually every name that begins with its own, so it counts patents an affiliate holds; each list row names the holder of record. Security interests are excluded and ambiguous records are not reviewed by hand.
Fee due within 90 days marks a patent with a maintenance fee due within 90 days of the date this page was computed and not yet recorded paid, so it can end earlier than the bar shows. A fee left unpaid ends the patent at the close of the six month grace period that follows its due date, not on the due date itself. It is not a prediction that the fee will be missed.
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.