Inventor
Donald L. Chapman
Inventor
Liberty, IN, US
Overview
Patents· 12 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H02Gprimary
H02GInstallation of electric cables or lines, or of combined optical and electric cables or lines59%
H01RElectrically-conductive connections12%
A47KSanitary equipment6%
F02BInternal-combustion piston engines6%
F02MSupplying combustion engines in general with combustible mixtures or constituents thereof6%
F24HFluid heaters, e.g. water or air heaters, having heat-generating means, e.g. heat pumps, in general6%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests6%
PatentTitleYear
5,415,557'Busway tap off base assembly for preventing the ingress of dust and liquids'19955,125,199'Floor duct with integral interlock'19925,111,538'Knockdown portable hotwater shower and shower head therefor'19925,024,251'Lay-in wireway assembly'19915,023,396'Pop-up service fitting'19914,931,597'Junction boxes'19904,922,672'Snap-on underfloor preset'19904,899,506'Large capacity electrical service fitting for concrete floors'19904,349,220'Raintight wireway'19824,272,643'Fire resistant fitting'19814,270,318'Fire resistant fitting floor holes'19813,937,767'Carburetor'1976Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1976–1992Patents assigned to CHAPMAN DONALD L (2)· patent assignee history
1976Based in Tallmadge, OH, US· patent location history
1981–1995Patents assigned to SQUARE D CO (10)· patent assignee history
1981–1995Based in Liberty, IN, US· patent location history
1992Based in Meadow Vista, CA, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| SQUARE D CO | 10 | 1981–1995 |
| CHAPMAN DONALD Lself | 2 | 1976–1992 |
Locations
| Location | Patents | Span |
|---|---|---|
| Liberty, IN, US | 10 | 1981–1995 |
| Meadow Vista, California, US | 1 | 1992 |
| Tallmadge, OH, US | 1 | 1976 |