Vacuum tube audio amplifier
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Feb 26, 2019
Grant Date -
N/A
app pub date -
Aug 31, 2017
filing date -
Aug 31, 2017
priority date (Note) -
In Force
status (Latency Note)
Importance
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US Family Size
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Non-US Coverage
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Abstract
The present invention provides a vacuum tube audio amplifier which includes an audio pre-amplifying portion and an audio output transforming portion. The audio pre-amplifying portion includes an equalizer for enhanced sound quality and amplifies an audio signal, which is subsequently transmitted to the audio output transforming portion. Furthermore, the audio output transforming portion includes an audio output transformer which includes a plurality of stacked E-shaped silicon steel sheets and a plurality of stacked I-shaped silicon steel sheets, wherein the stacked E-shaped silicon steel sheets and the stacked I-shaped silicon steel sheets have a same height which is smaller than or equal to 48 mm.
First Claim
Other Claims data not available
Family
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International Classification(s)
- 2017 Application Filing Year
- G10H Class
- 329 Applications Filed
- 263 Patents Issued To-Date
- 79.94 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 1 Citation Count
- G10H Class
- 24.09 % this patent is cited more than
- 6 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Aug 26, 2026 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Aug 26, 2030 |