Inventor
Chi F. Tung
Inventor
Mahtomedi, MN, US
Overview
16→
Patents
1976–1987
Patent span
General tagging of new technological developments
Primary field (CPC Y)
Patents· 16 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
Y10Tprimary
Y10TTechnical subjects covered by former us classification23%
G02BOptical elements, systems or apparatus20%
C03CChemical composition of glasses, glazes or vitreous enamels11%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests11%
A42BHats6%
C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients6%
C08LCompositions of macromolecular compounds6%
E01FAdditional work, such as equipping roads or the construction of platforms, helicopter landing stages, signs, snow fences, or the like6%
A01KAnimal husbandry3%
C08JWorking-up3%
PatentTitleYear
4,712,868'Expanded retroreflective sheet material'19874,678,695'Encapsulated flattop retroreflective sheeting and method for producing the same'19874,569,857'Retroreflective sheeting'19864,511,210'Retroreflective sheeting'19854,377,988'Reflective animal collar and material for forming such a collar'19834,367,920'Retroflective sheeting'19834,367,919'Durable glass elements'19834,348,312'Ultra-high-index glass microspheres and products made therefrom with a fluoropolymer and an ester polymer blend'19824,248,932'Extended-life pavement-marking sheet material'19814,192,576'Ultra-high-index glass microspheres and products made therefrom'1980RE029742'Retroreflective protective helmet'19784,100,625'Helmets and other articles reflectorized with retroreflective platelet particles'19784,005,538'Internally illuminated retroreflective signs'19774,004,930'Fluid composition for forming retroreflective structures'19773,946,130'Transparent glass microspheres and products made therefrom'19763,934,065'Retroreflective sheet material'1976Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1976–1987Patents assigned to MINNESOTA MINING & MFG (15)· patent assignee history
1976–1987Based in Mahtomedi, MN, US· patent location history
1983Based in St. Paul, MN, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| MINNESOTA MINING & MFG | 15 | 1976–1987 |
Locations
| Location | Patents | Span |
|---|---|---|
| Mahtomedi, Minnesota, US | 14 | 1976–1987 |
| St. Paul, Minnesota, US | 2 | 1983 |