52 patents currently held
3 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.
5 more records may belong here and await a decision; they are not counted.
The next term ends in Nov 2027. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
11
Ending by 2030
Nov 2027
Next term end
25
Patent families
When these terms end
Held patents by the year their term ends
notable patents
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.
Notable patents
Ranked by citations and family size, against patents of the same kind granted the same year. How we rank
Notable
Ends Oct 2034 · High confidence
Also notable
Ends Sep 2033 · High confidence
Also notable
Ends Nov 2029 · High confidence
Drum Pedal with Adjustment Features
US 9,589,546
The most cited patent in this portfolio, cited by 23 later US patents, top 25% of utility patents granted in 2017 in our data. Protection runs to 2034.
Adjustable Cajón Instrument
US 9,087,497
The largest patent family in this portfolio, 27 related applications, renewed at every maintenance window due so far. Protection runs to 2033.
Adjusting Device for Snare Drum
US 8,143,507
Renewed at every maintenance window since the 2012 grant; no more fees are due before its term ends in 2029.
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.
- 1 fee due Jan 21, 2027The maintenance fee for Adjustable Cajón Instrument (US 9,087,497) comes due Jan 21, 2027. Unpaid by Jul 21, 2027, it lapses early.
- 1 fee due Jul 19, 2027The maintenance fee for Pivot Supports for Drum Rim (US 9,240,169) comes due Jul 19, 2027. Unpaid by Jan 19, 2028, it lapses early.
- 1 fee due Aug 9, 2027The maintenance fee for Eyebolt Bracket Assembly (US 9,257,109) comes due Aug 9, 2027. Unpaid by Feb 9, 2028, it lapses early.
- 1 fee due Sep 5, 2027The maintenance fee for Electronic Cymbal Instruments and Systems (US 11,922,907) comes due Sep 5, 2027. Unpaid by Mar 6, 2028, it lapses early.
Recent changes
- 3 terms have ended since Aug 16, 2026
What they patent
The 5 largest of its 25 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Top-Tuning System for Hand Percussion Instrument | 15 in force | to Jan 2038 |
| Drum Pedal with Adjustment Features | 7 in force | to Jan 2036 |
| Safety Hoop for Drum | 3 in force | to Jan 2032 |
| Electronic Musical Instruments and Systems | 2 in force | to Jul 2043 |
| Electronic Cymbal Instruments and Systems | 2 in force | to Nov 2041 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,641,560 | Take-Up in Drum Actuation Drive Trains In force · High confidence | In force | High confidence | |
| US 7,718,876 | Angled Grain Drum Shell Ply Configuration In force · High confidence | In force | High confidence | |
| US 7,942,176 | Drum Shell Formation In force · High confidence | In force | High confidence | |
| US 7,812,236 | One-Piece Wooden Drum Shell Formation In force · High confidence | In force | High confidence | |
| US 7,902,444 | Magnetic and Adjustable Throw-Off for Snare Drum In force · High confidence | In force | High confidence | |
| US 8,143,507 | Adjusting Device for Snare Drum In force · High confidence | In force | High confidence | |
| US 7,964,781 | Rotating Multi-Stem Instrument Bracket In force · High confidence | In force | High confidence | |
| US 8,609,967 | Top-Tuning System for Hand Percussion Instrument In force · High confidence | In force | High confidence | |
| US 9,437,176 | Top-Tuning System for Hand Percussion Instrument In force · High confidence | In force | High confidence | |
| US 8,101,841 | One-Handed Musical Triangle In force · High confidence | In force | High confidence |
Also on record, not counted in the 52: 3 patents in force now held by others · 43 patents ended · 12 applications pending · 5 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.
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.