Inventor · Perryville, MD, US

John E. Sheaffer

28Patents
15h-index
19Co-inventors
74Inventor score

Filing activity: Jan 13, 1989 → May 18, 2001

Most-cited inventions

PatentTitleAreaCited byStatus
US5924384A Animal cage assembly and combination water bottle holder and feeder Human Necessities 64 Expired
US5954013A Ventilated cage and rack system Performing Operations; Transporting 50 Expired
US6158387A Ventilated cage and rack system Performing Operations; Transporting 43 Expired
US5694885A Animal feeder with perch assembly Human Necessities 42 Expired
US5349923A Ventilated cage and open rack system Human Necessities 39 Expired
US6295950A Filter cap for an animal cage Human Necessities 36 Expired
US5165362A Ventilated cage and open rack system Human Necessities 35 Expired
US6227146A Filter top for rodent cage Performing Operations; Transporting 34 Expired
US6341581B1 Multispecies rodent cage Performing Operations; Transporting 31 Expired
US4989545A Ventilated cage and open rack system Human Necessities 23 Expired
US6041741A Multispecies rodent cage Performing Operations; Transporting 23 Expired
US5042429A Ventilated cage and rack system Human Necessities 22 Expired
US6336427B1 Feeder assembly for use in a cage Performing Operations; Transporting 21 Expired
US5097750A Waste management disposal system Emerging Cross-Sectional Technologies 18 Expired
US5975024A Cage for receiving a feeder Human Necessities 18 Expired
US5950567A Multiple dosage feeder for animal cage Human Necessities 11 Expired
USD420772S Water bottle General 11 Expired
USD397526S Feeder for an animal cage General 10 Expired
US6029698A Air regulator valve for ventilated cage and rack system Emerging Cross-Sectional Technologies 10 Expired
US5311836A Ventilated cage and open rack system Human Necessities 8 Expired
USD403130S Bottle General 4 Expired
US5048460A Modular animal kennel Human Necessities 4 Expired
US5735233A Animal cage rack locking mechanism Human Necessities 3 Expired
US6336425B1 Multispecies rodent cage Performing Operations; Transporting 3 Expired
USD379683S Wire bar lid for an animal cage General 3 Expired

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.