Inventor
Kam Hoi Ma
Inventor
Hong Kong, CN
Overview
Patents· 9 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
A46Bprimary
A46BBrushes29%
A46DManufacture of brushes29%
A47LDomestic washing or cleaning29%
C23CCoating metallic material4%
H03HImpedance networks, e.g. resonant circuits4%
Y10TTechnical subjects covered by former us classification4%
PatentTitleYear
11,122,949Surface cleaning apparatus202111,096,543Surface cleaning apparatus202111,096,539Surface cleaning apparatus202111,096,542Surface cleaning apparatus202111,096,540Surface cleaning apparatus202111,096,541Surface cleaning apparatus202111,089,933Surface cleaning apparatus20218,007,910'Ultrahard multilayer coating comprising nanocrystalline diamond and nanocrystalline cubic boron nitride'20117,579,759'Surface acoustic wave (SAW) devices based on cubic boron nitride/diamond composite structures'2009Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2009–2011Patents assigned to UNIV CITY HONG KONG (2)· patent assignee history
2009–2021Based in Hong Kong, CN· patent location history
2021Patents assigned to BISSELL INC (7)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| BISSELL INC | 7 | 2021 |
| UNIV CITY HONG KONG | 2 | 2009–2011 |
Locations
| Location | Patents | Span |
|---|---|---|
| Hong Kong, CN | 9 | 2009–2021 |