Inventor
William C. Pierce
Inventor
Muskegon, MI, US
Overview
Patents· 52 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
B60Gprimary
B60GVehicle suspension arrangements28%
B60TVehicle brake control systems or parts thereof16%
Y10TTechnical subjects covered by former us classification11%
F16DCouplings for transmitting rotation10%
B62DMotor vehicles7%
F16FSprings4%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests4%
B21DWorking or processing of sheet metal or metal tubes, rods or profiles without essentially removing material3%
B23PMetal-working not otherwise provided for3%
B60BVehicle wheels2%
PatentTitleYear
6,702,325'Modular trailing arm suspension'20046,491,314'Trailing arm suspension with wrapper compression axle mounting and articulated axle mounting'20026,328,322'Drive axle suspension'20016,241,266'Trailing arm suspension with wrapper compression axle mounting and articulated axle mounting'20016,152,486'Anti-creep device'2000RE036955'Fluid-operated brake actuator with internal valve'20006,006,651'Spring brake actuator with filtered service vent opening'19996,003,433'Tamper-resistant brake actuator'19995,924,712'Dual trailing arm vehicle suspension'19995,921,532'Air spring with internal support member'19995,799,564'Spring brake actuator having two-ply pressure plate assembly'19985,787,932'Bypass tube for time delay height control valve'19985,725,076'Spring brake actuator and caging bolt therefor'19985,722,311'Fluid-operated brake actuator with spring chamber isolation'19985,713,238'Spring brake actuator with spring force measurement'19985,682,922'Dual in-line height control valve assembly'19975,664,478'Spring brake actuator with corrosion fuses'19975,655,431'Spring brake actuator, caging bolt assembly therefor, and method of assembly thereof'19975,649,469'Stroke indicator for an air-operated combination diaphragm spring brake'19975,639,110'Trailing arm suspension'19975,588,665'Trailing arm suspension with lever arm'19965,413,374'Adjustable bushing'19955,393,096'Suspension frame bracket'19955,377,579'Fluid-operated spring brake atuator with funnel-shaped pressure plate'19955,375,819'Dual in-line height control valve assembly'19945,372,059'Fluid operated brake actuator with internal valve'19945,353,688'Tamper-resistant brake actuator'19945,345,858'Spring brake actuator with a pressure plate bearing for a caging tool'19945,335,932'Apparatus for mounting a trailing arm air suspension to a sliding frame'19945,335,695'Height control valve with adjustable spool'19945,320,026'Spring brake actuator with dust guard'19945,315,918'Tamper-resistant brake actuator'19945,203,585'Split-beam suspension system'19935,116,075'Trailing arm suspension with wrapper compression axle mounting'19925,112,078'Axle mounting assembly'19925,088,763'Apparatus for mounting a trailing arm air suspension to a sliding frame'19925,083,812'Suspension with stiffener arm'19924,858,949'Lightweight trailing arm suspension'19894,729,579'Axle lift mechanism with spring cup wear plate'19884,693,486'Trailing arm suspension with wrapper compression axle mounting'19874,634,141'Axle lift mechanism'19874,615,539'Suspension for automotive vehicles'19864,601,378'Supporting bracket for hydraulic pump and clutch'19864,564,092'Two speed, two pulley compressor drive clutch'19864,553,773'Load equalizer valve and suspension system'19854,296,851'Drive hub with curved springs and drive keys for electro-magnetic clutch'19814,262,929'Suspension with resilient reaction bar'19814,133,553'Self-closing trailer coupler'19794,129,026'Method of making a pulley groove'1978D0247849'Clutch pulley measuring device'19784,069,572'Method of making clutch pulley assembly'19784,004,335'Method of making clutch pulley'1977Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1977–1986Patents assigned to PITTS IND INC (6)· patent assignee history
1977–1981Based in Dallas, TX, US· patent location history
1979–2004Based in Muskegon, MI, US· patent location history
1981–1988Patents assigned to LEAR SIEGLER INC (6)· patent assignee history
1986Based in Carrollton, TX, US· patent location history
1994–1998Patents assigned to NAI ANCHORLOK INC (12)· patent assignee history
1994–1998Patents assigned to NAI NEWAY INC (9)· patent assignee history
1998Based in Muskegoon, MI, US· patent location history
1999–2001Patents assigned to HOLLAND NEWAY INT INC (5)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| NAI ANCHORLOK INC | 12 | 1994–1998 |
| NAI NEWAY INC | 9 | 1994–1998 |
| LEAR SIEGLER INC | 6 | 1981–1988 |
| PITTS IND INC | 6 | 1977–1986 |
| HOLLAND NEWAY INT INC | 5 | 1999–2001 |
Locations
| Location | Patents | Span |
|---|---|---|
| Muskegon, MI, US | 44 | 1979–2004 |
| Dallas, Texas, US | 5 | 1977–1981 |
| Carrollton, Texas, US | 2 | 1986 |
| Muskegoon, MI, US | 1 | 1998 |